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  • what is acceptable datastore latency on VMware ESXi host?

    - by BeowulfNode42
    Looking at our performance figures on our existing VMware ESXi 4.1 host at the Datastore/Real-time performance data Write Latency Avg 14 ms Max 41 ms Read Latency Avg 4.5 ms Max 12 ms People don't seem to be complaining too much about it being slow with those numbers. But how much higher could they get before people found it to be a problem? We are reviewing our head office systems due to running low on storage space, and are tossing up between buying a 2nd VM host with DAS or buying some sort of NAS for SMB file shares in the near term and maybe running VMs from it in the longer term. Currently we have just under 40 staff at head office with 9 smaller branches spread across the country. Head office is runnning in an MS RDS session based environment with linux ERP and mail systems. In total 22 VMs on a single host with DAS made from a RAID 10 made of 6x 15k SAS disks.

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  • How do I make Linux recognize a new SATA /dev/sda drive I hot swapped in without rebooting?

    - by Philip Durbin
    Hot swapping out a failed SATA /dev/sda drive worked fine, but when I went to swap in a new drive, it wasn't recognized: [root@fs-2 ~]# tail -18 /var/log/messages May 5 16:54:35 fs-2 kernel: ata1: exception Emask 0x10 SAct 0x0 SErr 0x50000 action 0xe frozen May 5 16:54:35 fs-2 kernel: ata1: SError: { PHYRdyChg CommWake } May 5 16:54:40 fs-2 kernel: ata1: link is slow to respond, please be patient (ready=0) May 5 16:54:45 fs-2 kernel: ata1: device not ready (errno=-16), forcing hardreset May 5 16:54:45 fs-2 kernel: ata1: soft resetting link May 5 16:54:50 fs-2 kernel: ata1: link is slow to respond, please be patient (ready=0) May 5 16:54:55 fs-2 kernel: ata1: SRST failed (errno=-16) May 5 16:54:55 fs-2 kernel: ata1: soft resetting link May 5 16:55:00 fs-2 kernel: ata1: link is slow to respond, please be patient (ready=0) May 5 16:55:05 fs-2 kernel: ata1: SRST failed (errno=-16) May 5 16:55:05 fs-2 kernel: ata1: soft resetting link May 5 16:55:10 fs-2 kernel: ata1: link is slow to respond, please be patient (ready=0) May 5 16:55:40 fs-2 kernel: ata1: SRST failed (errno=-16) May 5 16:55:40 fs-2 kernel: ata1: limiting SATA link speed to 1.5 Gbps May 5 16:55:40 fs-2 kernel: ata1: soft resetting link May 5 16:55:45 fs-2 kernel: ata1: SRST failed (errno=-16) May 5 16:55:45 fs-2 kernel: ata1: reset failed, giving up May 5 16:55:45 fs-2 kernel: ata1: EH complete I tried a couple things to make the server find the new /dev/sda, such as rescan-scsi-bus.sh but they didn't work: [root@fs-2 ~]# echo "---" > /sys/class/scsi_host/host0/scan -bash: echo: write error: Invalid argument [root@fs-2 ~]# [root@fs-2 ~]# /root/rescan-scsi-bus.sh -l [snip] 0 new device(s) found. 0 device(s) removed. [root@fs-2 ~]# [root@fs-2 ~]# ls /dev/sda ls: /dev/sda: No such file or directory I ended up rebooting the server. /dev/sda was recognized, I fixed the software RAID, and everything is fine now. But for next time, how can I make Linux recognize a new SATA drive I have hot swapped in without rebooting? The operating system in question is RHEL5.3: [root@fs-2 ~]# cat /etc/redhat-release Red Hat Enterprise Linux Server release 5.3 (Tikanga) The hard drive is a Seagate Barracuda ES.2 SATA 3.0-Gb/s 500-GB, model ST3500320NS. Here is the lscpi output: [root@fs-2 ~]# lspci 00:00.0 RAM memory: nVidia Corporation MCP55 Memory Controller (rev a2) 00:01.0 ISA bridge: nVidia Corporation MCP55 LPC Bridge (rev a3) 00:01.1 SMBus: nVidia Corporation MCP55 SMBus (rev a3) 00:02.0 USB Controller: nVidia Corporation MCP55 USB Controller (rev a1) 00:02.1 USB Controller: nVidia Corporation MCP55 USB Controller (rev a2) 00:04.0 IDE interface: nVidia Corporation MCP55 IDE (rev a1) 00:05.0 IDE interface: nVidia Corporation MCP55 SATA Controller (rev a3) 00:05.1 IDE interface: nVidia Corporation MCP55 SATA Controller (rev a3) 00:05.2 IDE interface: nVidia Corporation MCP55 SATA Controller (rev a3) 00:06.0 PCI bridge: nVidia Corporation MCP55 PCI bridge (rev a2) 00:08.0 Bridge: nVidia Corporation MCP55 Ethernet (rev a3) 00:09.0 Bridge: nVidia Corporation MCP55 Ethernet (rev a3) 00:0a.0 PCI bridge: nVidia Corporation MCP55 PCI Express bridge (rev a3) 00:0b.0 PCI bridge: nVidia Corporation MCP55 PCI Express bridge (rev a3) 00:0c.0 PCI bridge: nVidia Corporation MCP55 PCI Express bridge (rev a3) 00:0d.0 PCI bridge: nVidia Corporation MCP55 PCI Express bridge (rev a3) 00:0e.0 PCI bridge: nVidia Corporation MCP55 PCI Express bridge (rev a3) 00:0f.0 PCI bridge: nVidia Corporation MCP55 PCI Express bridge (rev a3) 00:18.0 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] HyperTransport Technology Configuration 00:18.1 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Address Map 00:18.2 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] DRAM Controller 00:18.3 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Miscellaneous Control 00:19.0 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] HyperTransport Technology Configuration 00:19.1 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Address Map 00:19.2 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] DRAM Controller 00:19.3 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Miscellaneous Control 03:00.0 VGA compatible controller: Matrox Graphics, Inc. MGA G200e [Pilot] ServerEngines (SEP1) (rev 02) 04:00.0 PCI bridge: NEC Corporation uPD720400 PCI Express - PCI/PCI-X Bridge (rev 06) 04:00.1 PCI bridge: NEC Corporation uPD720400 PCI Express - PCI/PCI-X Bridge (rev 06) Update: In perhaps a dozen cases, we've been forced to reboot servers because hot swap hasn't "just worked." Thanks for the answers to look more into the SATA controller. I've included the lspci output for the problematic system above (hostname: fs-2). I could still use some help understanding what exactly isn't supported hardware-wise in terms of hot swap for that system. Please let me know what other output besides lspci might be useful. The good news is that hot swap "just worked" today on one of our servers (hostname: www-1), which is very rare for us. Here is the lspci output: [root@www-1 ~]# lspci 00:00.0 RAM memory: nVidia Corporation MCP55 Memory Controller (rev a2) 00:01.0 ISA bridge: nVidia Corporation MCP55 LPC Bridge (rev a3) 00:01.1 SMBus: nVidia Corporation MCP55 SMBus (rev a3) 00:02.0 USB Controller: nVidia Corporation MCP55 USB Controller (rev a1) 00:02.1 USB Controller: nVidia Corporation MCP55 USB Controller (rev a2) 00:04.0 IDE interface: nVidia Corporation MCP55 IDE (rev a1) 00:05.0 IDE interface: nVidia Corporation MCP55 SATA Controller (rev a3) 00:05.1 IDE interface: nVidia Corporation MCP55 SATA Controller (rev a3) 00:05.2 IDE interface: nVidia Corporation MCP55 SATA Controller (rev a3) 00:06.0 PCI bridge: nVidia Corporation MCP55 PCI bridge (rev a2) 00:08.0 Bridge: nVidia Corporation MCP55 Ethernet (rev a3) 00:09.0 Bridge: nVidia Corporation MCP55 Ethernet (rev a3) 00:0b.0 PCI bridge: nVidia Corporation MCP55 PCI Express bridge (rev a3) 00:0c.0 PCI bridge: nVidia Corporation MCP55 PCI Express bridge (rev a3) 00:0f.0 PCI bridge: nVidia Corporation MCP55 PCI Express bridge (rev a3) 00:18.0 Host bridge: Advanced Micro Devices [AMD] K10 [Opteron, Athlon64, Sempron] HyperTransport Configuration 00:18.1 Host bridge: Advanced Micro Devices [AMD] K10 [Opteron, Athlon64, Sempron] Address Map 00:18.2 Host bridge: Advanced Micro Devices [AMD] K10 [Opteron, Athlon64, Sempron] DRAM Controller 00:18.3 Host bridge: Advanced Micro Devices [AMD] K10 [Opteron, Athlon64, Sempron] Miscellaneous Control 00:18.4 Host bridge: Advanced Micro Devices [AMD] K10 [Opteron, Athlon64, Sempron] Link Control 00:19.0 Host bridge: Advanced Micro Devices [AMD] K10 [Opteron, Athlon64, Sempron] HyperTransport Configuration 00:19.1 Host bridge: Advanced Micro Devices [AMD] K10 [Opteron, Athlon64, Sempron] Address Map 00:19.2 Host bridge: Advanced Micro Devices [AMD] K10 [Opteron, Athlon64, Sempron] DRAM Controller 00:19.3 Host bridge: Advanced Micro Devices [AMD] K10 [Opteron, Athlon64, Sempron] Miscellaneous Control 00:19.4 Host bridge: Advanced Micro Devices [AMD] K10 [Opteron, Athlon64, Sempron] Link Control 03:00.0 VGA compatible controller: Matrox Graphics, Inc. MGA G200e [Pilot] ServerEngines (SEP1) (rev 02) 04:00.0 PCI bridge: NEC Corporation uPD720400 PCI Express - PCI/PCI-X Bridge (rev 06) 04:00.1 PCI bridge: NEC Corporation uPD720400 PCI Express - PCI/PCI-X Bridge (rev 06) 09:00.0 SCSI storage controller: LSI Logic / Symbios Logic SAS1064ET PCI-Express Fusion-MPT SAS (rev 04)

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  • Two Network Adapters on Hyper-V Host - Best way to configure?

    - by GoNorthWest
    Hi, I have two physical network adapters installed in my Hyper-V host. I want one to be dedicated to the host, and the other to provide external network services to the VMs. Would the appropriate configuration be as such: Leave the first physical network adapter alone, assigning it the host IP, but not using it to create any Virtual Netorks For the second physical adapter, I would create an External Network, along with a Microsoft Virtual Switch, and use that to provide network services to the VMs. Each virtual NIC for the VM would be associated with that External Network. A static IP would be assigned to this adapter, and each VM would be assigned a static IP as well. The above seems reasonable to me, but I'm not sure if it's correct. Does anyone have any thoughts? Thanks! Mark

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  • How do I make Linux recognize a new SATA /dev/sda drive I hot swapped in without rebooting?

    - by Philip Durbin
    Hot swapping out a failed SATA /dev/sda drive worked fine, but when I went to swap in a new drive, it wasn't recognized: [root@fs-2 ~]# tail -18 /var/log/messages May 5 16:54:35 fs-2 kernel: ata1: exception Emask 0x10 SAct 0x0 SErr 0x50000 action 0xe frozen May 5 16:54:35 fs-2 kernel: ata1: SError: { PHYRdyChg CommWake } May 5 16:54:40 fs-2 kernel: ata1: link is slow to respond, please be patient (ready=0) May 5 16:54:45 fs-2 kernel: ata1: device not ready (errno=-16), forcing hardreset May 5 16:54:45 fs-2 kernel: ata1: soft resetting link May 5 16:54:50 fs-2 kernel: ata1: link is slow to respond, please be patient (ready=0) May 5 16:54:55 fs-2 kernel: ata1: SRST failed (errno=-16) May 5 16:54:55 fs-2 kernel: ata1: soft resetting link May 5 16:55:00 fs-2 kernel: ata1: link is slow to respond, please be patient (ready=0) May 5 16:55:05 fs-2 kernel: ata1: SRST failed (errno=-16) May 5 16:55:05 fs-2 kernel: ata1: soft resetting link May 5 16:55:10 fs-2 kernel: ata1: link is slow to respond, please be patient (ready=0) May 5 16:55:40 fs-2 kernel: ata1: SRST failed (errno=-16) May 5 16:55:40 fs-2 kernel: ata1: limiting SATA link speed to 1.5 Gbps May 5 16:55:40 fs-2 kernel: ata1: soft resetting link May 5 16:55:45 fs-2 kernel: ata1: SRST failed (errno=-16) May 5 16:55:45 fs-2 kernel: ata1: reset failed, giving up May 5 16:55:45 fs-2 kernel: ata1: EH complete I tried a couple things to make the server find the new /dev/sda, such as rescan-scsi-bus.sh but they didn't work: [root@fs-2 ~]# echo "---" > /sys/class/scsi_host/host0/scan -bash: echo: write error: Invalid argument [root@fs-2 ~]# [root@fs-2 ~]# /root/rescan-scsi-bus.sh -l [snip] 0 new device(s) found. 0 device(s) removed. [root@fs-2 ~]# [root@fs-2 ~]# ls /dev/sda ls: /dev/sda: No such file or directory I ended up rebooting the server. /dev/sda was recognized, I fixed the software RAID, and everything is fine now. But for next time, how can I make Linux recognize a new SATA drive I have hot swapped in without rebooting? The operating system in question is RHEL5.3: [root@fs-2 ~]# cat /etc/redhat-release Red Hat Enterprise Linux Server release 5.3 (Tikanga) The hard drive is a Seagate Barracuda ES.2 SATA 3.0-Gb/s 500-GB, model ST3500320NS. Here is the lscpi output: [root@fs-2 ~]# lspci 00:00.0 RAM memory: nVidia Corporation MCP55 Memory Controller (rev a2) 00:01.0 ISA bridge: nVidia Corporation MCP55 LPC Bridge (rev a3) 00:01.1 SMBus: nVidia Corporation MCP55 SMBus (rev a3) 00:02.0 USB Controller: nVidia Corporation MCP55 USB Controller (rev a1) 00:02.1 USB Controller: nVidia Corporation MCP55 USB Controller (rev a2) 00:04.0 IDE interface: nVidia Corporation MCP55 IDE (rev a1) 00:05.0 IDE interface: nVidia Corporation MCP55 SATA Controller (rev a3) 00:05.1 IDE interface: nVidia Corporation MCP55 SATA Controller (rev a3) 00:05.2 IDE interface: nVidia Corporation MCP55 SATA Controller (rev a3) 00:06.0 PCI bridge: nVidia Corporation MCP55 PCI bridge (rev a2) 00:08.0 Bridge: nVidia Corporation MCP55 Ethernet (rev a3) 00:09.0 Bridge: nVidia Corporation MCP55 Ethernet (rev a3) 00:0a.0 PCI bridge: nVidia Corporation MCP55 PCI Express bridge (rev a3) 00:0b.0 PCI bridge: nVidia Corporation MCP55 PCI Express bridge (rev a3) 00:0c.0 PCI bridge: nVidia Corporation MCP55 PCI Express bridge (rev a3) 00:0d.0 PCI bridge: nVidia Corporation MCP55 PCI Express bridge (rev a3) 00:0e.0 PCI bridge: nVidia Corporation MCP55 PCI Express bridge (rev a3) 00:0f.0 PCI bridge: nVidia Corporation MCP55 PCI Express bridge (rev a3) 00:18.0 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] HyperTransport Technology Configuration 00:18.1 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Address Map 00:18.2 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] DRAM Controller 00:18.3 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Miscellaneous Control 00:19.0 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] HyperTransport Technology Configuration 00:19.1 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Address Map 00:19.2 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] DRAM Controller 00:19.3 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Miscellaneous Control 03:00.0 VGA compatible controller: Matrox Graphics, Inc. MGA G200e [Pilot] ServerEngines (SEP1) (rev 02) 04:00.0 PCI bridge: NEC Corporation uPD720400 PCI Express - PCI/PCI-X Bridge (rev 06) 04:00.1 PCI bridge: NEC Corporation uPD720400 PCI Express - PCI/PCI-X Bridge (rev 06) Update: In perhaps a dozen cases, we've been forced to reboot servers because hot swap hasn't "just worked." Thanks for the answers to look more into the SATA controller. I've included the lspci output for the problematic system above (hostname: fs-2). I could still use some help understanding what exactly isn't supported hardware-wise in terms of hot swap for that system. Please let me know what other output besides lspci might be useful. The good news is that hot swap "just worked" today on one of our servers (hostname: www-1), which is very rare for us. Here is the lspci output: [root@www-1 ~]# lspci 00:00.0 RAM memory: nVidia Corporation MCP55 Memory Controller (rev a2) 00:01.0 ISA bridge: nVidia Corporation MCP55 LPC Bridge (rev a3) 00:01.1 SMBus: nVidia Corporation MCP55 SMBus (rev a3) 00:02.0 USB Controller: nVidia Corporation MCP55 USB Controller (rev a1) 00:02.1 USB Controller: nVidia Corporation MCP55 USB Controller (rev a2) 00:04.0 IDE interface: nVidia Corporation MCP55 IDE (rev a1) 00:05.0 IDE interface: nVidia Corporation MCP55 SATA Controller (rev a3) 00:05.1 IDE interface: nVidia Corporation MCP55 SATA Controller (rev a3) 00:05.2 IDE interface: nVidia Corporation MCP55 SATA Controller (rev a3) 00:06.0 PCI bridge: nVidia Corporation MCP55 PCI bridge (rev a2) 00:08.0 Bridge: nVidia Corporation MCP55 Ethernet (rev a3) 00:09.0 Bridge: nVidia Corporation MCP55 Ethernet (rev a3) 00:0b.0 PCI bridge: nVidia Corporation MCP55 PCI Express bridge (rev a3) 00:0c.0 PCI bridge: nVidia Corporation MCP55 PCI Express bridge (rev a3) 00:0f.0 PCI bridge: nVidia Corporation MCP55 PCI Express bridge (rev a3) 00:18.0 Host bridge: Advanced Micro Devices [AMD] K10 [Opteron, Athlon64, Sempron] HyperTransport Configuration 00:18.1 Host bridge: Advanced Micro Devices [AMD] K10 [Opteron, Athlon64, Sempron] Address Map 00:18.2 Host bridge: Advanced Micro Devices [AMD] K10 [Opteron, Athlon64, Sempron] DRAM Controller 00:18.3 Host bridge: Advanced Micro Devices [AMD] K10 [Opteron, Athlon64, Sempron] Miscellaneous Control 00:18.4 Host bridge: Advanced Micro Devices [AMD] K10 [Opteron, Athlon64, Sempron] Link Control 00:19.0 Host bridge: Advanced Micro Devices [AMD] K10 [Opteron, Athlon64, Sempron] HyperTransport Configuration 00:19.1 Host bridge: Advanced Micro Devices [AMD] K10 [Opteron, Athlon64, Sempron] Address Map 00:19.2 Host bridge: Advanced Micro Devices [AMD] K10 [Opteron, Athlon64, Sempron] DRAM Controller 00:19.3 Host bridge: Advanced Micro Devices [AMD] K10 [Opteron, Athlon64, Sempron] Miscellaneous Control 00:19.4 Host bridge: Advanced Micro Devices [AMD] K10 [Opteron, Athlon64, Sempron] Link Control 03:00.0 VGA compatible controller: Matrox Graphics, Inc. MGA G200e [Pilot] ServerEngines (SEP1) (rev 02) 04:00.0 PCI bridge: NEC Corporation uPD720400 PCI Express - PCI/PCI-X Bridge (rev 06) 04:00.1 PCI bridge: NEC Corporation uPD720400 PCI Express - PCI/PCI-X Bridge (rev 06) 09:00.0 SCSI storage controller: LSI Logic / Symbios Logic SAS1064ET PCI-Express Fusion-MPT SAS (rev 04)

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  • How to connect XP mode VM to the host so as to simulate LAN Activities?

    - by rsjethani
    First of all my PC config: Host:Windows 7(32-bit) Guest: Windows XP SP3 as XP Mode. Integration Features Disabled(I don't think it has any thing to do with networking). Network Connections on Host : 1.Local Area Connection(Realtek...) - unplugged(as no other PC is connected). 2.Nokia 2730 classic USB Modem - I use this connect to the internet. Now,How can I connect the guest to the host as if they were on a LAN. Please give specific steps as I am using Windows XP Mode/Virtual machine for the first time.

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  • Can I temporarily leave other roles active when converting a 2008 R2 server to a hyper-v host?

    - by Eric
    I currently have a Windows 2008 R2 box that I want to convert to a hyper-v host. Currently I have the following running on it: File Services, Web Server (IIS), and Sql Server 2008 R2 with a few different DBs. In the long term, I'd like to move all of those over to the VMs that will be created. However, in the short term I'd like to leave them running on the server. Are there any complications/problems with leaving them running on the hyper-v server for a day or two? How long will those services typically go down during the addition of the hyper-v role? Right now my plan is to back up everything, enable the hyper-v role, set up VMs, and migrate stuff off of the host. However, if there is a good probability that something may cease to function I might need to migrate everything over to a temporary host before doing the conversion.

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  • Cacti is not monitoring the correct host... How do I change SNMP target?

    - by wil
    I have been handed a Cacti server that monitors a few hosts. I noticed that three of the targets were displaying the exact same data - the cacti machine, machine a and machine b. After doing a bit of digging, I noticed that machine a and machine b had "Local Linux Machine" set under "Host Template". I have since changed the host template to "Generic SNMP-enabled Host", however, all the graphs still only display data from the local cacti machine (Updates every 5 minutes - I changed this yesterday - 12 hours). I can't think what else is wrong and was wondering if anyone knows/can recommend anything?

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  • Virtual PC "The page cannot be displayed" error connecting to iis7.5 site on Win7 host.

    - by stan
    I setup virtual pc with the Windows XP IE6 VHD to test a site on Windows 7 host. I created a loopback adapter connection on the host. I have several sites on IIS 7.5, I'm able to connect to all of them except one. And it's the site I need to test... I get "The page cannot be displayed" error. The site loads fine from the host(Windows 7). I've made sure the permissions match that of the other sites that do load. I've recreated the application in IIS manager. Does anyone know what the problem might be?

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  • AppFabric named cache, what happens if you lose a cache host?

    - by Liam
    I'm getting my head around how app fabric clustering works and there's something I'm not sure about. Given a structure where we have one named cache, with two lead hosts and (say) three cache hosts and high availability turned off and the lead host(s) performing the management role. When one cache host goes down do you loose the data that was on that cache host? In this MSDN article it states: Data on the non-lead hosts would be lost (assuming high availability was not enabled), but the rest of the cluster could continue serving and storing data But I was unsure if redundancy is built into the system. Would you loose x amount of data or would one of the other cache hosts store this data also and pick up the slack?

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  • Deploying virtual machines - Windows Guest/Linux Host or vice versa?

    - by samoz
    I'm looking to deploy several virtual machines for users. They need access to both Windows and Linux. They also need to use the computers graphics card (for Photoshop, modeling, etc) under Windows. My question is, will an Ubuntu host/Windows guest or a Windows host/Ubuntu guest be faster? I'm somewhat worried about Windows getting a cluttered registry and slow, but on the otherhand, a Windows host would have direct access to hardware (Unless I'm just unaware of how to grant hardware access to a guest). Does the choice of software (VMware or VirtualBox) effect the choice?

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  • Two Network Adapters on Hyper-V Host - Best way to configure?

    - by GoNorthWest
    I have two physical network adapters installed in my Hyper-V host. I want one to be dedicated to the host, and the other to provide external network services to the VMs. Would the appropriate configuration be as such: Leave the first physical network adapter alone, assigning it the host IP, but not using it to create any Virtual Netorks For the second physical adapter, I would create an External Network, along with a Microsoft Virtual Switch, and use that to provide network services to the VMs. Each virtual NIC for the VM would be associated with that External Network. A static IP would be assigned to this adapter, and each VM would be assigned a static IP as well. The above seems reasonable to me, but I'm not sure if it's correct. Does anyone have any thoughts? Thanks! Mark

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  • Should the virtualization host be allowed to run any service?

    - by Giordano
    I recently setup a virtualization server for the small company I'm running. This server runs few virtual machines that are used for development, testing, etc... My business partner works from a remote location, thus I also installed a vpn server on the virtualization host to make it possible for him to safely reach the company services. Moreover, again on the virtualization host, I installed bacula to perform the backup of the data. Is it advisable/good practice to do so or should I create one more virtual machine to do backups and VPN? Is it a bad idea to run these services on the host itself? If yes, why? Thanks in advance!

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  • Python: combine logging and wx so that logging stream is redirectet to stdout/stderr frame

    - by Uwe
    Here's the thing: I'm trying to combine the logging module with wx.App()'s redirect feature. My intention is to log to a file AND to stderr. But I want stderr/stdout redirected to a separate frame as is the feature of wx.App. My test code: import logging import wx class MyFrame(wx.Frame): def __init__(self): self.logger = logging.getLogger("main.MyFrame") wx.Frame.__init__(self, parent = None, id = wx.ID_ANY, title = "MyFrame") self.logger.debug("MyFrame.__init__() called.") def OnExit(self): self.logger.debug("MyFrame.OnExit() called.") class MyApp(wx.App): def __init__(self, redirect): self.logger = logging.getLogger("main.MyApp") wx.App.__init__(self, redirect = redirect) self.logger.debug("MyApp.__init__() called.") def OnInit(self): self.frame = MyFrame() self.frame.Show() self.SetTopWindow(self.frame) self.logger.debug("MyApp.OnInit() called.") return True def OnExit(self): self.logger.debug("MyApp.OnExit() called.") def main(): logger_formatter = logging.Formatter("%(name)s\t%(levelname)s\t%(message)s") logger_stream_handler = logging.StreamHandler() logger_stream_handler.setLevel(logging.INFO) logger_stream_handler.setFormatter(logger_formatter) logger_file_handler = logging.FileHandler("test.log", mode = "w") logger_file_handler.setLevel(logging.DEBUG) logger_file_handler.setFormatter(logger_formatter) logger = logging.getLogger("main") logger.setLevel(logging.DEBUG) logger.addHandler(logger_stream_handler) logger.addHandler(logger_file_handler) logger.info("Logger configured.") app = MyApp(redirect = True) logger.debug("Created instance of MyApp. Calling MainLoop().") app.MainLoop() logger.debug("MainLoop() ended.") logger.info("Exiting program.") return 0 if (__name__ == "__main__"): main() Expected behavior is: - a file is created named test.log - the file contains logging messages with level DEBUG and INFO/ERROR/WARNING/CRITICAL - messages from type INFO and ERROR/WARNING/CRITICAL are ether shown on the console or in a separate frame, depending on where they are created - logger messages that are not inside MyApp or MyFrame are displayed at the console - logger messages from inside MyApp or MyFrame are shown in a separate frame Actual behavior is: - The file is created and contains: main INFO Logger configured. main.MyFrame DEBUG MyFrame.__init__() called. main.MyFrame INFO MyFrame.__init__() called. main.MyApp DEBUG MyApp.OnInit() called. main.MyApp INFO MyApp.OnInit() called. main.MyApp DEBUG MyApp.__init__() called. main DEBUG Created instance of MyApp. Calling MainLoop(). main.MyApp DEBUG MyApp.OnExit() called. main DEBUG MainLoop() ended. main INFO Exiting program. - Console output is: main INFO Logger configured. main.MyFrame INFO MyFrame.__init__() called. main.MyApp INFO MyApp.OnInit() called. main INFO Exiting program. - No separate frame is opened, although the lines main.MyFrame INFO MyFrame.__init__() called. main.MyApp INFO MyApp.OnInit() called. shouldget displayed within a frame and not on the console. It seems to me that wx.App can't redirect stderr to a frame as soon as a logger instance uses stderr as output. wxPythons Docs claim the wanted behavior though, see here. Any ideas? Uwe

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  • One letter game problem?

    - by Alex K
    Recently at a job interview I was given the following problem: Write a script capable of running on the command line as python It should take in two words on the command line (or optionally if you'd prefer it can query the user to supply the two words via the console). Given those two words: a. Ensure they are of equal length b. Ensure they are both words present in the dictionary of valid words in the English language that you downloaded. If so compute whether you can reach the second word from the first by a series of steps as follows a. You can change one letter at a time b. Each time you change a letter the resulting word must also exist in the dictionary c. You cannot add or remove letters If the two words are reachable, the script should print out the path which leads as a single, shortest path from one word to the other. You can /usr/share/dict/words for your dictionary of words. My solution consisted of using breadth first search to find a shortest path between two words. But apparently that wasn't good enough to get the job :( Would you guys know what I could have done wrong? Thank you so much. import collections import functools import re def time_func(func): import time def wrapper(*args, **kwargs): start = time.time() res = func(*args, **kwargs) timed = time.time() - start setattr(wrapper, 'time_taken', timed) return res functools.update_wrapper(wrapper, func) return wrapper class OneLetterGame: def __init__(self, dict_path): self.dict_path = dict_path self.words = set() def run(self, start_word, end_word): '''Runs the one letter game with the given start and end words. ''' assert len(start_word) == len(end_word), \ 'Start word and end word must of the same length.' self.read_dict(len(start_word)) path = self.shortest_path(start_word, end_word) if not path: print 'There is no path between %s and %s (took %.2f sec.)' % ( start_word, end_word, find_shortest_path.time_taken) else: print 'The shortest path (found in %.2f sec.) is:\n=> %s' % ( self.shortest_path.time_taken, ' -- '.join(path)) def _bfs(self, start): '''Implementation of breadth first search as a generator. The portion of the graph to explore is given on demand using get_neighboors. Care was taken so that a vertex / node is explored only once. ''' queue = collections.deque([(None, start)]) inqueue = set([start]) while queue: parent, node = queue.popleft() yield parent, node new = set(self.get_neighbours(node)) - inqueue inqueue = inqueue | new queue.extend([(node, child) for child in new]) @time_func def shortest_path(self, start, end): '''Returns the shortest path from start to end using bfs. ''' assert start in self.words, 'Start word not in dictionnary.' assert end in self.words, 'End word not in dictionnary.' paths = {None: []} for parent, child in self._bfs(start): paths[child] = paths[parent] + [child] if child == end: return paths[child] return None def get_neighbours(self, word): '''Gets every word one letter away from the a given word. We do not keep these words in memory because bfs accesses a given vertex only once. ''' neighbours = [] p_word = ['^' + word[0:i] + '\w' + word[i+1:] + '$' for i, w in enumerate(word)] p_word = '|'.join(p_word) for w in self.words: if w != word and re.match(p_word, w, re.I|re.U): neighbours += [w] return neighbours def read_dict(self, size): '''Loads every word of a specific size from the dictionnary into memory. ''' for l in open(self.dict_path): l = l.decode('latin-1').strip().lower() if len(l) == size: self.words.add(l) if __name__ == '__main__': import sys if len(sys.argv) not in [3, 4]: print 'Usage: python one_letter_game.py start_word end_word' else: g = OneLetterGame(dict_path = '/usr/share/dict/words') try: g.run(*sys.argv[1:]) except AssertionError, e: print e

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  • Convert your Hash keys to object properties in Ruby

    - by kerry
    Being a Ruby noob (and having a background in Groovy), I was a little surprised that you can not access hash objects using the dot notation.  I am writing an application that relies heavily on XML and JSON data.  This data will need to be displayed and I would rather use book.author.first_name over book[‘author’][‘first_name’].  A quick search on google yielded this post on the subject. So, taking the DRYOO (Don’t Repeat Yourself Or Others) concept.  I came up with this: 1: class ::Hash 2:  3: # add keys to hash 4: def to_obj 5: self.each do |k,v| 6: if v.kind_of? Hash 7: v.to_obj 8: end 9: k=k.gsub(/\.|\s|-|\/|\'/, '_').downcase.to_sym 10: self.instance_variable_set("@#{k}", v) ## create and initialize an instance variable for this key/value pair 11: self.class.send(:define_method, k, proc{self.instance_variable_get("@#{k}")}) ## create the getter that returns the instance variable 12: self.class.send(:define_method, "#{k}=", proc{|v| self.instance_variable_set("@#{k}", v)}) ## create the setter that sets the instance variable 13: end 14: return self 15: end 16: end This works pretty well.  It converts each of your keys to properties of the Hash.  However, it doesn’t sit very well with me because I probably will not use 90% of the properties most of the time.  Why should I go through the performance overhead of creating instance variables for all of the unused ones? Enter the ‘magic method’ #missing_method: 1: class ::Hash 2: def method_missing(name) 3: return self[name] if key? name 4: self.each { |k,v| return v if k.to_s.to_sym == name } 5: super.method_missing name 6: end 7: end This is a much cleaner method for my purposes.  Quite simply, it checks to see if there is a key with the given symbol, and if not, loop through the keys and attempt to find one. I am a Ruby noob, so if there is something I am overlooking, please let me know.

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  • Powershell: Install-dotNET4 function

    - by marc dekeyser
    This function will download and install ,NET 4.0. It uses the Get-Framework-Versions function to determine if the installation is necessary or not. Internet Connectivity will be required as the script auto downloads the setup file (and sleeps for 360 seconds... I had a function in there to monitor for install completion at first, turns out the setup file spawns so many childprocesses the function just got confused and locked up -_-)Alternatively you could drop the installation file in the folder specified on the $folderPath variable too. That will skip the download and use the file. This function easily adapts in to other versions f.e. I use it for Powershell 3 installs as well!Function install-dotNet4 () {    if(($InstalledDotNET -eq "4.0") -or ($InstalledDotNET -eq "4.0c")){        write-host ".NET 4.0 Framework is already installed" -foregroundcolor Green    } else{            #set a var for the folder you are looking for        $folderPath = 'C:\Temp'        #Check if folder exists, if not, create it        if (Test-Path $folderpath){            Write-Host "The folder $folderPath exists." -ForeGroundColor Green        } else{            Write-Host "The folder $folderPath does not exist, creating..." -NoNewline -ForegroundColor Red            New-Item $folderpath -type directory | Out-Null            Write-Host " - done!" -ForegroundColor Green        }        # Check if file exists, if not, download it        $file = $folderPath+"\dotNetFx40_Full_x86_x64.exe"        if (Test-Path $file){            write-host "The file $file exists." -ForeGroundColor Green        } else {            #Download Microsoft .Net 4.0 Framework            Write-Host "Downloading Microsoft .Net 4.0 Framework..." -nonewline -ForeGroundColor DarkYellow            $clnt = New-Object System.Net.WebClient            $url = "http://download.microsoft.com/download/9/5/A/95A9616B-7A37-4AF6-BC36-D6EA96C8DAAE/dotNetFx40_Full_x86_x64.exe"            $clnt.DownloadFile($url,$file)            Write-Host " - done!" -ForegroundColor Green        }        #Install Microsoft .Net Framework        Write-Host "Installing Microsoft .Net Framework..." -nonewline -ForegroundColor DarkYellow        $dotNET4 = $folderPath+"\dotNetFx40_Full_x86_x64.exe /quiet /norestart"        Invoke-Expression $dotNET4        write-host " - done!" -ForegroundColor Green        start-sleep -seconds 360    }}

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  • Can't install the wireless driver in HP Pavilion dv2419us

    - by maqtanim
    I've just installed Ubuntu 13.04 in an old HP Pavilion dv2419us. The problem is, Ubuntu doesn't detect the wireless card. But it works fine in Windows 7. The following command returns nothing! lspci -vvnn | grep 14e4 And the lspci output is: 00:00.1 RAM memory: NVIDIA Corporation C51 Memory Controller 0 (rev a2) 00:00.2 RAM memory: NVIDIA Corporation C51 Memory Controller 1 (rev a2) 00:00.3 RAM memory: NVIDIA Corporation C51 Memory Controller 5 (rev a2) 00:00.4 RAM memory: NVIDIA Corporation C51 Memory Controller 4 (rev a2) 00:00.5 RAM memory: NVIDIA Corporation C51 Host Bridge (rev a2) 00:00.6 RAM memory: NVIDIA Corporation C51 Memory Controller 3 (rev a2) 00:00.7 RAM memory: NVIDIA Corporation C51 Memory Controller 2 (rev a2) 00:02.0 PCI bridge: NVIDIA Corporation C51 PCI Express Bridge (rev a1) 00:03.0 PCI bridge: NVIDIA Corporation C51 PCI Express Bridge (rev a1) 00:05.0 VGA compatible controller: NVIDIA Corporation C51 [GeForce Go 6150] (rev a2) 00:09.0 RAM memory: NVIDIA Corporation MCP51 Host Bridge (rev a2) 00:0a.0 ISA bridge: NVIDIA Corporation MCP51 LPC Bridge (rev a3) 00:0a.1 SMBus: NVIDIA Corporation MCP51 SMBus (rev a3) 00:0a.3 Co-processor: NVIDIA Corporation MCP51 PMU (rev a3) 00:0b.0 USB controller: NVIDIA Corporation MCP51 USB Controller (rev a3) 00:0b.1 USB controller: NVIDIA Corporation MCP51 USB Controller (rev a3) 00:0d.0 IDE interface: NVIDIA Corporation MCP51 IDE (rev f1) 00:0e.0 IDE interface: NVIDIA Corporation MCP51 Serial ATA Controller (rev f1) 00:10.0 PCI bridge: NVIDIA Corporation MCP51 PCI Bridge (rev a2) 00:10.1 Audio device: NVIDIA Corporation MCP51 High Definition Audio (rev a2) 00:14.0 Bridge: NVIDIA Corporation MCP51 Ethernet Controller (rev a3) 00:18.0 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] HyperTransport Technology Configuration 00:18.1 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Address Map 00:18.2 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] DRAM Controller 00:18.3 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Miscellaneous Control 05:09.0 FireWire (IEEE 1394): Ricoh Co Ltd R5C832 IEEE 1394 Controller 05:09.1 SD Host controller: Ricoh Co Ltd R5C822 SD/SDIO/MMC/MS/MSPro Host Adapter (rev 19) 05:09.2 System peripheral: Ricoh Co Ltd R5C592 Memory Stick Bus Host Adapter (rev 0a) 05:09.3 System peripheral: Ricoh Co Ltd xD-Picture Card Controller (rev 05) The command lspci -nn | grep 0280 gives no output. Any suggestion regarding this?

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  • Computer becomes unreachable on lan after some time

    - by Ashfame
    I work on my laptop and ssh into my desktop. I use a lot of key based authentication for many servers for work but recently I couldn't login because ssh would pick up and try all the keys and it stops trying before ultimately falling back to password based login. So right now I am using this command: ssh -X -o PubkeyAuthentication=no [email protected] #deskto The issue is after sometime the desktop would just become unreachable from laptop. I won't be able to open its localhost through IP and today I tried ping'in it and found a weird thing. Instead of 192.168.1.4, it tries to ping 192.168.1.3 which I am sure is the root cause as it just can't reach 192.168.1.4 when its actually trying for 192.168.1.3 Ping command output: ashfame@ashfame-xps:~$ ping 192.168.1.4 PING 192.168.1.4 (192.168.1.4) 56(84) bytes of data. From 192.168.1.3 icmp_seq=1 Destination Host Unreachable From 192.168.1.3 icmp_seq=2 Destination Host Unreachable From 192.168.1.3 icmp_seq=3 Destination Host Unreachable From 192.168.1.3 icmp_seq=4 Destination Host Unreachable From 192.168.1.3 icmp_seq=5 Destination Host Unreachable From 192.168.1.3 icmp_seq=6 Destination Host Unreachable From 192.168.1.3 icmp_seq=7 Destination Host Unreachable From 192.168.1.3 icmp_seq=8 Destination Host Unreachable From 192.168.1.3 icmp_seq=9 Destination Host Unreachable ^C --- 192.168.1.4 ping statistics --- 10 packets transmitted, 0 received, +9 errors, 100% packet loss, time 9047ms pipe 3 Also the ping command message comes in multiple and not one by one. (izx answer's the weirdness I thought there was in ping command.) I did check for desktop, its local IP is still the same, so something is going on in my laptop. Any ideas? P.S. - Laptop runs Ubuntu 12.04 & Desktop runs Ubuntu 11.10 Laptop is connected through wifi to router and Desktop is connected through LAN to router. Update: Even after setting up static IP leases in router settings, I again ran into this issue.

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  • PyGTK/Quickly Add string to ListStore

    - by AllRadioisDead
    I'm trying to build an application that will prompt the user for a string, and then add that string to a Scrolling Listview object using quickly and PyGTK. I've been following this tutorial: http://developer.ubuntu.com/resources/app-developer-cookbook/multimedia/creating-a-simple-media-player/ When I hit the add button, the prompt comes up properly and I'm able to enter the string. The column appears correctly but the list ends up being blank. What am I doing wrong? import gettext from gettext import gettext as _ gettext.textdomain('spiderweb') from gi.repository import Gtk # pylint: disable=E0611 import logging logger = logging.getLogger('spiderweb') from spiderweb_lib import Window from spiderweb.AboutSpiderwebDialog import AboutSpiderwebDialog from spiderweb.PreferencesSpiderwebDialog import PreferencesSpiderwebDialog from quickly import prompts from quickly.widgets.dictionary_grid import DictionaryGrid import os # See spiderweb_lib.Window.py for more details about how this class works class SpiderwebWindow(Window): __gtype_name__ = "SpiderwebWindow" def finish_initializing(self, builder): # pylint: disable=E1002 """Set up the main window""" super(SpiderwebWindow, self).finish_initializing(builder) self.AboutDialog = AboutSpiderwebDialog self.PreferencesDialog = PreferencesSpiderwebDialog # Code for other initialization actions should be added here. self.supported_web_formats = [".net",".html", ".com"] def on_addbutton_clicked(self, widget, data=None): #let the user choose a path with the directory chooser response, string = prompts.string("Enter a string", "Please enter string:", "Sample Text") #make certain the user said ok before working if response == Gtk.ResponseType.OK: #make a list of the supported media files media_files = Gtk.ListStore(str) #add a dictionary to the list of media files media_files.append({"String":string}) #remove any children in scrolled window for c in self.ui.scrolledwindow1.get_children(): self.ui.scrolledwindow1.remove(c) #create the grid with list of dictionaries #only show the File column media_grid = DictionaryGrid(media_files, keys=["File"]) #show the grid, and add it to the scrolled window media_grid.show_all() self.ui.scrolledwindow1.add(media_grid)

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  • Authenticate with Django 1.5

    - by gorjuce
    I'm currently testing django 1.5 and a custom User model, but I've some problems. I've created a User class in my account app, which looks like: class User(AbstractBaseUser): email = models.EmailField() activation_key = models.CharField(max_length=255) is_active = models.BooleanField(default=False) is_admin = models.BooleanField(default=False) USERNAME_FIELD = 'email' I can correctly register a user, who is stored in my account_user table. Now, how can I log in? I've tried with: def login(request): form = AuthenticationForm() if request.method == 'POST': form = AuthenticationForm(request.POST) email = request.POST['username'] password = request.POST['password'] user = authenticate(username=email, password=password) if user is not None: if user.is_active: login(user) else: message = 'disabled account, check validation email' return render( request, 'account-login-failed.html', {'message': message} ) return render(request, 'account-login.html', {'form': form}) I can correctly register a new User My forms.py which contains my register form class RegisterForm(forms.ModelForm): """ a form to create user""" password = forms.CharField( label="Password", widget=forms.PasswordInput() ) password_confirm = forms.CharField( label="Password Repeat", widget=forms.PasswordInput() ) class Meta: model = User exclude = ('last_login', 'activation_key') def clean_password_confirm(self): password = self.cleaned_data.get("password") password_confirm = self.cleaned_data.get("password_confirm") if password and password_confirm and password != password_confirm: raise forms.ValidationError("Password don't math") return password_confirm def clean_email(self): if User.objects.filter(email__iexact=self.cleaned_data.get("email")): raise forms.ValidationError("email already exists") return self.cleaned_data['email'] def save(self): user = super(RegisterForm, self).save(commit=False) user.password = self.cleaned_data['password'] user.activation_key = generate_sha1(user.email) user.save() return user My question is: Why does authenticate give me None? I know I'm trying to authenticate() with an email as username but is that not one of the reasons to use a custom User model?

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  • iPhone SDK Tableview Datasource singleton error

    - by mrburns05
    I basically followed apple "TheElements" sample and changed "PeriodicElements" .h & .m to my own "SortedItems" .h & .m During compile I get this error: "Undefined symbols: "_OBJC_CLASS_$_SortedItems", referenced from: __objc_classrefs__DATA@0 in SortedByNameTableDataSource.o ld: symbol(s) not found collect2: ld returned 1 exit status " here is my SortedItems.m file #import "SortedItems.h" #import "item.h" #import "MyAppDelegate.h" @interface SortedItems(mymethods) // these are private methods that outside classes need not use - (void)presortItemsByPhysicalState; - (void)presortItemInitialLetterIndexes; - (void)presortItemNamesForInitialLetter:(NSString *)aKey; - (void)presortItemsWithPhysicalState:(NSString *)state; - (NSArray *)presortItemsByNumber; - (NSArray *)presortItemsBySymbol; - (void)setupItemsArray; @end @implementation SortedItems @synthesize statesDictionary; @synthesize itemsDictionary; @synthesize nameIndexesDictionary; @synthesize itemNameIndexArray; @synthesize itemsSortedByNumber; @synthesize itemsSortedBySymbol; @synthesize itemPhysicalStatesArray; static SortedItems *sharedSortedItemsInstance = nil; + (SortedItems*)sharedSortedItems { @synchronized(self) { if (sharedSortedItemsInstance == nil) { [[self alloc] init]; // assignment not done here } } return sharedSortedItemsInstance; // note: Xcode (3.2) static analyzer will report this singleton as a false positive // '(Potential leak of an object allocated') } + (id)allocWithZone:(NSZone *)zone { @synchronized(self) { if (sharedSortedItemsInstance == nil) { sharedSortedItemsInstance = [super allocWithZone:zone]; return sharedSortedItemsInstance; // assignment and return on first allocation } } return nil; //on subsequent allocation attempts return nil } - (id)copyWithZone:(NSZone *)zone { return self; } - (id)retain { return self; } - (unsigned)retainCount { return UINT_MAX; //denotes an object that cannot be released } - (void)release { //do nothing } - (id)autorelease { return self; } // setup the data collection - init { if (self = [super init]) { [self setupItemsArray]; } return self; } - (void)setupItemsArray { NSDictionary *eachItem; // create dictionaries that contain the arrays of Item data indexed by // name self.itemsDictionary = [NSMutableDictionary dictionary]; // physical state self.statesDictionary = [NSMutableDictionary dictionary]; // unique first characters (for the Name index table) self.nameIndexesDictionary = [NSMutableDictionary dictionary]; // create empty array entries in the states Dictionary or each physical state [statesDictionary setObject:[NSMutableArray array] forKey:@"Solid"]; [statesDictionary setObject:[NSMutableArray array] forKey:@"Liquid"]; [statesDictionary setObject:[NSMutableArray array] forKey:@"Gas"]; [statesDictionary setObject:[NSMutableArray array] forKey:@"Artificial"]; MyAppDelegate *ad = (MyAppDelegate *)[[UIApplication sharedApplication]delegate]; NSMutableArray *rawItemsArray = [[NSMutableArray alloc] init]; [rawItemsArray addObjectsFromArray:ad.items]; // iterate over the values in the raw Items dictionary for (eachItem in rawItemsArray) { // create an atomic Item instance for each Item *anItem = [[Item alloc] initWithDictionary:eachItem]; // store that item in the Items dictionary with the name as the key [itemsDictionary setObject:anItem forKey:anItem.title]; // add that Item to the appropriate array in the physical state dictionary [[statesDictionary objectForKey:anItem.acct] addObject:anItem]; // get the Item's initial letter NSString *firstLetter = [anItem.title substringToIndex:1]; NSMutableArray *existingArray; // if an array already exists in the name index dictionary // simply add the Item to it, otherwise create an array // and add it to the name index dictionary with the letter as the key if (existingArray = [nameIndexesDictionary valueForKey:firstLetter]) { [existingArray addObject:anItem]; } else { NSMutableArray *tempArray = [NSMutableArray array]; [nameIndexesDictionary setObject:tempArray forKey:firstLetter]; [tempArray addObject:anItem]; } // release the Item, it is held by the various collections [anItem release]; } // release the raw Item data [rawItemsArray release]; // create the dictionary containing the possible Item states // and presort the states data self.itemPhysicalStatesArray = [NSArray arrayWithObjects:@"something",@"somethingElse",@"whatever",@"stuff",nil]; [self presortItemsByPhysicalState]; // presort the dictionaries now // this could be done the first time they are requested instead [self presortItemInitialLetterIndexes]; self.itemsSortedByNumber = [self presortItemsByNumber]; self.itemsSortedBySymbol = [self presortItemsBySymbol]; } // return the array of Items for the requested physical state - (NSArray *)itemsWithPhysicalState:(NSString*)aState { return [statesDictionary objectForKey:aState]; } // presort each of the arrays for the physical states - (void)presortItemsByPhysicalState { for (NSString *stateKey in itemPhysicalStatesArray) { [self presortItemsWithPhysicalState:stateKey]; } } - (void)presortItemsWithPhysicalState:(NSString *)state { NSSortDescriptor *nameDescriptor = [[NSSortDescriptor alloc] initWithKey:@"title" ascending:YES selector:@selector(localizedCaseInsensitiveCompare:)] ; NSArray *descriptors = [NSArray arrayWithObject:nameDescriptor]; [[statesDictionary objectForKey:state] sortUsingDescriptors:descriptors]; [nameDescriptor release]; } // return an array of Items for an initial letter (ie A, B, C, ...) - (NSArray *)itemsWithInitialLetter:(NSString*)aKey { return [nameIndexesDictionary objectForKey:aKey]; } // presort the name index arrays so the items are in the correct order - (void)presortItemsInitialLetterIndexes { self.itemNameIndexArray = [[nameIndexesDictionary allKeys] sortedArrayUsingSelector:@selector(localizedCaseInsensitiveCompare:)]; for (NSString *eachNameIndex in itemNameIndexArray) { [self presortItemNamesForInitialLetter:eachNameIndex]; } } - (void)presortItemNamesForInitialLetter:(NSString *)aKey { NSSortDescriptor *nameDescriptor = [[NSSortDescriptor alloc] initWithKey:@"title" ascending:YES selector:@selector(localizedCaseInsensitiveCompare:)] ; NSArray *descriptors = [NSArray arrayWithObject:nameDescriptor]; [[nameIndexesDictionary objectForKey:aKey] sortUsingDescriptors:descriptors]; [nameDescriptor release]; } // presort the ItemsSortedByNumber array - (NSArray *)presortItemsByNumber { NSSortDescriptor *nameDescriptor = [[NSSortDescriptor alloc] initWithKey:@"acct" ascending:YES selector:@selector(compare:)] ; NSArray *descriptors = [NSArray arrayWithObject:nameDescriptor]; NSArray *sortedItems = [[itemsDictionary allValues] sortedArrayUsingDescriptors:descriptors]; [nameDescriptor release]; return sortedItems; } // presort the itemsSortedBySymbol array - (NSArray *)presortItemsBySymbol { NSSortDescriptor *symbolDescriptor = [[NSSortDescriptor alloc] initWithKey:@"title" ascending:YES selector:@selector(localizedCaseInsensitiveCompare:)] ; NSArray *descriptors = [NSArray arrayWithObject:symbolDescriptor]; NSArray *sortedItems = [[itemsDictionary allValues] sortedArrayUsingDescriptors:descriptors]; [symbolDescriptor release]; return sortedItems; } @end I followed the sample exactly - don't know where I went wrong. Here is my "SortedByNameTableDataSource.m" #import "SortedByNameTableDataSource.h" #import "SortedItems.h" #import "Item.h" #import "ItemCell.h" #import "GradientView.h" #import "UIColor-Expanded.h" #import "MyAppDelegate.h" @implementation SortedByNameTableDataSource - (NSString *)title { return @"Title"; } - (UITableViewStyle)tableViewStyle { return UITableViewStylePlain; }; // return the atomic element at the index - (Item *)itemForIndexPath:(NSIndexPath *)indexPath { return [[[SortedItems sharedSortedItems] itemsWithInitialLetter:[[[SortedItems sharedSortedItems] itemNameIndexArray] objectAtIndex:indexPath.section]] objectAtIndex:indexPath.row]; } // UITableViewDataSource methods - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *MyIdentifier = @"ItemCell"; ItemCell *itemCell = (ItemCell *)[tableView dequeueReusableCellWithIdentifier:MyIdentifier]; if (itemCell == nil) { itemCell = [[[ItemCell alloc] initWithFrame:CGRectZero reuseIdentifier:MyIdentifier] autorelease]; itemCell = CGRectMake(0.0, 0.0, 320.0, ROW_HEIGHT); itemCell.backgroundView = [[[GradientView alloc] init] autorelease]; } itemCell.todo = [self itemForIndexPath:indexPath]; return itemCell; } - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView { // this table has multiple sections. One for each unique character that an element begins with // [A,B,C,D,E,F,G,H,I,K,L,M,N,O,P,R,S,T,U,V,X,Y,Z] // return the count of that array return [[[SortedItems sharedSortedItems] itemNameIndexArray] count]; } - (NSArray *)sectionIndexTitlesForTableView:(UITableView *)tableView { // returns the array of section titles. There is one entry for each unique character that an element begins with // [A,B,C,D,E,F,G,H,I,K,L,M,N,O,P,R,S,T,U,V,X,Y,Z] return [[SortedItems sharedSortedItems] itemNameIndexArray]; } - (NSInteger)tableView:(UITableView *)tableView sectionForSectionIndexTitle:(NSString *)title atIndex:(NSInteger)index { return index; } - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { // the section represents the initial letter of the element // return that letter NSString *initialLetter = [[[SortedItems sharedSortedItems] itemNameIndexArray] objectAtIndex:section]; // get the array of elements that begin with that letter NSArray *itemsWithInitialLetter = [[SortedItems sharedSortedItems] itemsWithInitialLetter:initialLetter]; // return the count return [itemsWithInitialLetter count]; } - (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section { // this table has multiple sections. One for each unique character that an element begins with // [A,B,C,D,E,F,G,H,I,K,L,M,N,O,P,R,S,T,U,V,X,Y,Z] // return the letter that represents the requested section // this is actually a delegate method, but we forward the request to the datasource in the view controller return [[[SortedItems sharedSortedItems] itemNameIndexArray] objectAtIndex:section]; } @end

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  • How to bridge Debian guest VM to VPN via Cisco AnyConnect Client running on Windows Vista host

    - by bgoodr
    I am running Cisco Anyconnect VPN Client version 2.5.3054 on a laptop running Windows Vista Home Premium (version 6.0.6002) Service Pack 2. I am running the VMware Player version 4.0.2 build-591240. The host operating system running under VMware Player is Debian 6.0.2.1 i386. The laptop is connected to a wireless connection, and I can browse the web from Windows Vista using Firefox just fine. I am able to boot into the Debian VM and open up a browser and access websites on the WAN from within the VM just fine. I can ping real Linux hosts on my LAN via: ping <lan_system>.local where <lan_system> is the hostname returned from uname -a on that system on my LAN. From a DOS CMD shell, I am able to ping hosts that exist on the remote network served by the Cisco AnyConnect Client's VPN network (and without the .local suffix applied as above): ping <remote_system> However, from within the Debian VM, I expect to be able to also ping those same remote hosts (<remote_system>) that are tunnelled over the VPN set up by Cisco AnyConnect Client. Let's say that I can ping a <remote_system> called flubber from a DOS CMD prompt just fine. When I execute Linux ping command from inside the Debian VM via: ping flubber It returns immediately with this output: ping: unknown host flubber For reference since I suspect it will be useful, here is the output of the route print command from the DOS CMD prompt: route print =========================================================================== Interface List 30 ...00 05 9a 3c 7a 00 ...... Cisco AnyConnect VPN Virtual Miniport Adapter for Windows 11 ...00 1b 9e c4 de e5 ...... Atheros AR5007EG Wireless Network Adapter 26 ...00 50 56 c0 00 01 ...... VMware Virtual Ethernet Adapter for VMnet1 28 ...00 50 56 c0 00 08 ...... VMware Virtual Ethernet Adapter for VMnet8 1 ........................... Software Loopback Interface 1 12 ...02 00 54 55 4e 01 ...... Teredo Tunneling Pseudo-Interface 13 ...00 00 00 00 00 00 00 e0 Microsoft ISATAP Adapter #3 32 ...00 00 00 00 00 00 00 e0 Microsoft ISATAP Adapter #4 27 ...00 00 00 00 00 00 00 e0 isatap.{E5292CF6-4FBB-4320-806D-A6B366769255} 17 ...00 00 00 00 00 00 00 e0 Microsoft ISATAP Adapter #2 20 ...00 00 00 00 00 00 00 e0 Microsoft ISATAP Adapter #8 22 ...00 00 00 00 00 00 00 e0 Microsoft ISATAP Adapter #10 24 ...00 00 00 00 00 00 00 e0 Microsoft ISATAP Adapter #11 25 ...00 00 00 00 00 00 00 e0 Microsoft ISATAP Adapter #12 29 ...00 00 00 00 00 00 00 e0 isatap.{C3852986-5053-4E2E-BE60-52EA2FCF5899} 41 ...00 00 00 00 00 00 00 e0 Microsoft ISATAP Adapter #14 =========================================================================== At the top window border of the VM, clicking on Virtual Machine, then clicking on Virtual Machine Settings, then clicking on Network Adapter, I have these two options checked: [X] Bridged: Connected directly to the physical Network [X] Replicate physical network connection state [ ] NAT: used to share the hosts's IP address [ ] Host-only: A private network shared with the host [ ] LAN segment: [ ] <LAN Segments...> <Advanced> I've toyed with the other options such as NAT and Host-only but that had no effect. Is there some way to allow the VM to access those <remote_system>'s?

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  • KVM guest io is much slower than host io: is that normal?

    - by Evolver
    I have a Qemu-KVM host system setup on CentOS 6.3. Four 1TB SATA HDDs working in Software RAID10. Guest CentOS 6.3 is installed on separate LVM. People say that they see guest performance almost equal to host performance, but I don't see that. My i/o tests are showing 30-70% slower performance on guest than on host system. I tried to change scheduler (set elevator=deadline on host and elevator=noop on guest), set blkio.weight to 1000 in cgroup, change io to virtio... But none of these changes gave me any significant results. This is a guest .xml config part: <disk type='file' device='disk'> <driver name='qemu' type='raw'/> <source file='/dev/vgkvmnode/lv2'/> <target dev='vda' bus='virtio'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/> </disk> There are my tests: Host system: iozone test # iozone -a -i0 -i1 -i2 -s8G -r64k random random KB reclen write rewrite read reread read write 8388608 64 189930 197436 266786 267254 28644 66642 dd read test: one process and then four simultaneous processes # dd if=/dev/vgkvmnode/lv2 of=/dev/null bs=1M count=1024 iflag=direct 1073741824 bytes (1.1 GB) copied, 4.23044 s, 254 MB/s # dd if=/dev/vgkvmnode/lv2 of=/dev/null bs=1M count=1024 iflag=direct skip=1024 & dd if=/dev/vgkvmnode/lv2 of=/dev/null bs=1M count=1024 iflag=direct skip=2048 & dd if=/dev/vgkvmnode/lv2 of=/dev/null bs=1M count=1024 iflag=direct skip=3072 & dd if=/dev/vgkvmnode/lv2 of=/dev/null bs=1M count=1024 iflag=direct skip=4096 1073741824 bytes (1.1 GB) copied, 14.4528 s, 74.3 MB/s 1073741824 bytes (1.1 GB) copied, 14.562 s, 73.7 MB/s 1073741824 bytes (1.1 GB) copied, 14.6341 s, 73.4 MB/s 1073741824 bytes (1.1 GB) copied, 14.7006 s, 73.0 MB/s dd write test: one process and then four simultaneous processes # dd if=/dev/zero of=test bs=1M count=1024 oflag=direct 1073741824 bytes (1.1 GB) copied, 6.2039 s, 173 MB/s # dd if=/dev/zero of=test bs=1M count=1024 oflag=direct & dd if=/dev/zero of=test2 bs=1M count=1024 oflag=direct & dd if=/dev/zero of=test3 bs=1M count=1024 oflag=direct & dd if=/dev/zero of=test4 bs=1M count=1024 oflag=direct 1073741824 bytes (1.1 GB) copied, 32.7173 s, 32.8 MB/s 1073741824 bytes (1.1 GB) copied, 32.8868 s, 32.6 MB/s 1073741824 bytes (1.1 GB) copied, 32.9097 s, 32.6 MB/s 1073741824 bytes (1.1 GB) copied, 32.9688 s, 32.6 MB/s Guest system: iozone test # iozone -a -i0 -i1 -i2 -s512M -r64k random random KB reclen write rewrite read reread read write 524288 64 93374 154596 141193 149865 21394 46264 dd read test: one process and then four simultaneous processes # dd if=/dev/mapper/VolGroup-lv_home of=/dev/null bs=1M count=1024 iflag=direct skip=1024 1073741824 bytes (1.1 GB) copied, 5.04356 s, 213 MB/s # dd if=/dev/mapper/VolGroup-lv_home of=/dev/null bs=1M count=1024 iflag=direct skip=1024 & dd if=/dev/mapper/VolGroup-lv_home of=/dev/null bs=1M count=1024 iflag=direct skip=2048 & dd if=/dev/mapper/VolGroup-lv_home of=/dev/null bs=1M count=1024 iflag=direct skip=3072 & dd if=/dev/mapper/VolGroup-lv_home of=/dev/null bs=1M count=1024 iflag=direct skip=4096 1073741824 bytes (1.1 GB) copied, 24.7348 s, 43.4 MB/s 1073741824 bytes (1.1 GB) copied, 24.7378 s, 43.4 MB/s 1073741824 bytes (1.1 GB) copied, 24.7408 s, 43.4 MB/s 1073741824 bytes (1.1 GB) copied, 24.744 s, 43.4 MB/s dd write test: one process and then four simultaneous processes # dd if=/dev/zero of=test bs=1M count=1024 oflag=direct 1073741824 bytes (1.1 GB) copied, 10.415 s, 103 MB/s # dd if=/dev/zero of=test bs=1M count=1024 oflag=direct & dd if=/dev/zero of=test2 bs=1M count=1024 oflag=direct & dd if=/dev/zero of=test3 bs=1M count=1024 oflag=direct & dd if=/dev/zero of=test4 bs=1M count=1024 oflag=direct 1073741824 bytes (1.1 GB) copied, 49.8874 s, 21.5 MB/s 1073741824 bytes (1.1 GB) copied, 49.8608 s, 21.5 MB/s 1073741824 bytes (1.1 GB) copied, 49.8693 s, 21.5 MB/s 1073741824 bytes (1.1 GB) copied, 49.9427 s, 21.5 MB/s I wonder is that normal situation or did I missed something?

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  • Configure IPv6 routing

    - by godlark
    I've got IPv6 addresses from SIXXS. My host is connected with SIXXS network over a AICCU tunnel ("sixxs" interface). My host address is 2001:::2, the host on the end has address 2001:::1. On my host IPv6 is fully accessible. I have problem with configuring IPv6 network on VMs. I use VirtualBox, the VM (Ubuntu) uses tap1 (on the host bridged by br0) #!/bin/sh PATH=/sbin:/usr/bin:/bin:/usr/bin:/usr/sbin # create a tap tunctl -t tap1 ip link set up dev tap1 # create the bridge brctl addbr br0 brctl addif br0 tap1 # set the IP address and routing ip link set up dev br0 ip -6 route del 2001:6a0:200:172::/64 dev sixxs ip -6 route add 2001:6a0:200:172::1 dev sixxs ip -6 addr add 2001:6a0:200:172::2/64 dev br0 ip -6 route add 2001:6a0:200:172::2/64 dev br0 Host: routing table: 2001:6a0:200:172::1 dev sixxs metric 1024 2001:6a0:200:172::/64 dev br0 proto kernel metric 256 2001:6a0:200:172::/64 dev br0 metric 1024 2000::/3 dev sixxs metric 1024 fe80::/64 dev eth0 proto kernel metric 256 fe80::/64 dev sixxs proto kernel metric 256 fe80::/64 dev br0 proto kernel metric 256 fe80::/64 dev tap1 proto kernel metric 256 default via 2001:6a0:200:172::1 dev sixxs metric 1024 Guest: interface eth1 (it is connected with tap1): auto eth1 iface eth1 inet6 static address 2001:6a0:200:172::3 netmask 64 gateway 2001:6a0:200:172::2 Guest: routing table 2001:6a0:200:172::/64 dev eth1 proto kernel metric 256 fe80::/64 dev eth0 proto kernel metric 256 fe80::/64 dev eth1 proto kernel metric 256 default via 2001:6a0:200:172::2 dev eth1 metric 1024 The guest pings to the host, the host pings to the guest, the host pings to 2001:6a0:200:172::1, but the guest doesn't ping to 2001:6a0:200:172::1. The guest tries to ping, on the host (by tcdump) I can capture its packets, but the host doesn't send them to 2001:6a0:200:172::1. What have I missed in configuration?

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  • Why does nmap ping scan over a VPN link return all hosts alive?

    - by ewwhite
    I'm curious as to why running an nmap -sP (ping scan) on a remote subnet linked via a Cisco site-to-site IPSec tunnel returns "host up" status for every IP in the range. [root@xt ~]# nmap -sP 192.168.108.* Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2012-11-22 14:08 CST Host 192.168.108.0 appears to be up. Host 192.168.108.1 appears to be up. Host 192.168.108.2 appears to be up. Host 192.168.108.3 appears to be up. Host 192.168.108.4 appears to be up. Host 192.168.108.5 appears to be up. . . . Host 192.168.108.252 appears to be up. Host 192.168.108.253 appears to be up. Host 192.168.108.254 appears to be up. Host 192.168.108.255 appears to be up. Nmap finished: 256 IP addresses (256 hosts up) scanned in 14.830 seconds However, a ping of a known-down IP simply times out or doesn't return anything... [root@xt ~]# ping 192.168.108.201 PING 192.168.108.201 (192.168.108.201) 56(84) bytes of data. --- 192.168.108.201 ping statistics --- 144 packets transmitted, 0 received, 100% packet loss, time 143001ms Is there a more effective way to scan live devices connected in this manner?

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