solid state - Page 276 - Developer IT

Apache, suexec, PHP, suPHP

- by Chris_K

While I'm quite comfortable as a Linux user, my Linux Admin-fu is a bit weak. Thus, I'm here looking for guidance with a CentOS server I'm about to build. I need to setup an Apache2 web server for a few of our clients. I want each client's web content to be under their home directory (USERDIR in apache.conf, right?) for the static HTML sites. I want Apache to run as the client (suexec?). Some of their stuff will be PHP apps and I'm under the impression I'll want to look at suphp as well then. So basically I want to look like a small version of a shared web hosting company. Considering how common those are I thought I'd easily find a nice current How-To guide on setting this all up but so far I've had very little luck. I suspect my search words are off. So the questions (feel free to answer any or all): Anyone have some solid links to current/modern guides that would help me set this all up? No, the apache documentation site is not a guide ;-) Since I have a mix of static sites and PHP apps do I want/need both suexec and suphp installed? If so, does that introduce any challenges I should be aware of? Should I be looking at other options instead of suexec and suphp? I plan to give the end users SSH, SFTP or SCP access to their stuff (if that affects anything). Thanks in advance for your help.

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RAID 5 Install on Ubuntu Server 12.04 [closed]

- by tarabyte

Environment: Ubuntu Server 12.04, installing from bootable flash drive Error: No root file system is defined. Please correct this from the partitioning menu. I'm trying to set up a personal file server with software RAID 5. I just got three hard drives for this, but haven't found any solid documentation. I'm unsure what the basic way to partition my hard drives is. Can someone upload a screenshot of their "partition disks" screen so that I can compare with mine (attached)? Should I set the bootable flag? Do I need a /home partition? A /boot partition? Should I "Use [my partition] as: Ext4 journaling file system"? Or make that field "physical volume for RAID"? I am an engineer, but I have only a cursory knowledge of all-things-linux. If you know of any good learning resources I'd be happy to hear about those too (that way I don't have to blindly follow deprecated tutorials online). well, image would be here but i don't have a high enough reputation yet (please vote up :)) Thank you, References I've looked into: https://help.ubuntu.com/community/Installation/SoftwareRAID https://help.ubuntu.com/12.04/serverguide/advanced-installation.html http://forevergeeks.com/setup-ubuntu-server-with-raid-5/

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Two large, linked Excel files take 30 minutes to save, except in VMWare environment

- by Gerald L

I support some tax consultants who love to use Excel when they should probably be using Access. Anyway, they have created two Excel files, A and B. File B has cells linked to file A. File A is 27 MB and file B is 16 MB. One worksheet has roughly 1 million rows and there is another worksheet doing a whole bunch of SUMIF on the 1 million rows. Not the best idea, but whatever. Both Excel files open and recalculate within a reasonable amount of time (1-2 minutes). For a files that large, this is acceptable. Here is the problem: Once you change a cell, and save the file B, it takes a solid 30 minutes to save the file, and the processors are going full speed. I've tried this on 6 different machines, all running Windows XP SP3 with Office 2007 SP2 and all patches. The specs vary from one machine with 512 MB or RAM to a machine with 4 GB of RAM and quad processors. Same result every time. Here is the clincher: If I do this same save operation on a VMWare virtual machine, the file gets saved in 1 minute. I've tried this with my ESX servers at the office, my Mac Fusion at home, and VMWare workstation at the office. It does not matter how much RAM the virtual machine has... it saves in about 1 minute every time. Does anybody have any idea why this is happening and how to fix?

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Will Parallel-port dongle work on USB-to-Parallel Adapter?

- by Gary M. Mugford

We have a niche program running on a Win2K laptop that uses a security dongle connected to a parallel port for authentication. The laptop is getting creaky and I spent a frustrating night last night shopping various websites for a new laptop that had a parallel port. Seems I'm about three years late [G]. The question I have, is, if I buy a new(ish) laptop and use a USB-to-Parallel Port adapter, will the security dongle work? I know I'm not being specific about the app, but it's one most people wouldn't have heard of anyways. I've been guessing the answer to my question is no, since the app won't know to send a request out to the non-existent port. But, if the process actually is that the dongle sends a message INTO the computer every now and then, then it might work. And, I'm not sure whether the dongle is only needed at program startup time or randomly. The dongle is a 'permanent' addition to the old laptop. This is all about the money. We can have a newly-updated version of the program (which won't add any features we need) for the princely sum of $2700. Or we can spend $500 on a refurbed laptop still running WinXP, add a 30 buck adapter and keep the same solid, stolid performance we've come to appreciate. But it all comes down to the dongle behaviour. Oh, and a dock won't work. The whole laptop issue is about moving about the various nooks and crannies of the building with laptop in hand. Thanks for any suggestions/guidance. GM

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WD my cloud 4th is Super Slow

- by Saduser

I am using a WD my cloud 4Tb and I have read other posts about users complaining about getting only 10Mb per second. My problem is that I am getting about 100kb/s to transfer a 125gb iPhoto library. Estimated time is 11 days to transfer this file. This is unacceptable. On the back of the WD cloud I am getting a solid green light and from what I read this means that I am on a gigabyte network. I have mac book pro running Mac OS Mavericks. I have tried 4 different cables and turned off my router firewall. I don't run anti-virus nor any firewall on the mac. Other things I have checked: direct connection to both router and WD cloud device. Tried wireless but it is even slower. Previously I was able to transfer a 55Gb iPhoto library in 14 hours which I felt was acceptable. I figured it would take approximately double the time to transfer the 125gb file but 11 days is ridiculous. Any other suggestions? Anything else I can check (how to check it) what is the bottle neck?

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Set up WLAN in 3-level house

- by Balint Erdi

I'm having a hard time setting up the network in our house. It has three levels (basement, ground floor, first level). The WLAN is set up by an ASUS RT-N12 router which provides perfect coverage for the ground floor and the basement. However, I set up my "home office" in the basement where the signal barely arrived. So I purchased a TP-Link TL-WA901ND (300 Mbps) Access Point which I set up in the other corner of the ground floor to expand the ASUS router's range. I used the AP's Repeater mode for that. The distance between my computer and the TP-Link AP is 6-7 meters. There is a staircase going down from the ground floor to the basement so there are no solid walls between the computer and the AP. This setup mostly works (I am writing this from the basement) but it is not reliable (the signal strength sometimes goes down to ~40% of the max) sometimes so I wonder if I am doing it correctly or if there is a better way. Screenshot of the router's and the AP's dashboard screen follow: Any comments on what I am doing wrong or hints for improvement are appreciated. Thank you. UPDATE Tried one more thing, setting up the TP-LINK AP in Access Point mode. That way, I can make it use a different SSID. I enabled WDS/Bridge so that it expands the range of the ASUS router (see screenshot). That does not work, either, if I connect to the network set up by the TP-LINK device (PELSTER-2), I can't reach the external network (the Internet). It seems the problem always comes back to this, the TP-LINK does not have access to the external network, whatever its mode of operation.

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Portable USB drives hidden pertition - New request

- by ZXC

This question was made by Francesco on Jul 29 '11 at 17:14. and the replies were not satisfactory due they not point to an important problem that´s: Why could anyone want to make certain data only accesible for a program but not to the users?. For example: If I want to do a safe distribution of original music for demostration purposes I will need several requisites: 1) The music should be heard using a simple procedure like selecting the name of each song on a playlist of a mediaplayer. 2) The portable media, ussually a portable USB drive, must hide for complete and should make unaccesible the files that contain the audio data to anything but the mediaplayer, that must be in the first partition, the one that is visible. 3) Considering that´s impossible to really hide files in a non-hidden partition, a second hidden partition should be created in the USB drive and the audio data will be stored there. 4) The trick is to read the audio data files stored in the hidden partition with a mediaplayer stored in the visible partition, the media player also should be a complete standalone program and independent from any library of the operating system except of the OS audio system. 5) The hidden partition should have a copy protection scheme that could impede to do copies of the data or create working ISO images of it. I know that this description could not be technically accurate but it has a complete logic from the needs of a music producer against the problem of piracy. The philosophy that surrounds the concept is to transform a virtual object like a digital string of audio in a solid object like the analog vinyl discs are.

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Is a rubber keyboard suitable for heavy use?

- by Vilx-

Every keyboard wears out with time, and mine has some age already. The day it fails is coming closer and closer. So I'm slowly starting to look around for a new one. I use the keyboard for gaming and programming, so it gets some pretty solid use. I also tend to eat by the computer, so there's plenty of... uhh... lifeforms down there. Anyway, I was looking at these rubber keyboards. They come pretty cheap (my local computer shop has one for less than $20) and they seem to have some nice properties. They can be easily cleaned, they're quiet, and can be rolled up when needed (plus no worries about spilled drinks). However I'm wondering what their type-ability is. If I can't write on it at a decent speed, the rest of the features don't matter. Not that I'm a fast typer, but being a professional progammer does give a boost to the skill. I couldn't find any reviews on the net so I'm turning to you. Who has used these keyboards and what was your experience? Perhaps there is something else I haven't though of why such a keyboard would not be a good idea?

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Files on ext4 on Drobo with corrupt, zero-ed out blocks

- by Patrick

I have a 2TB ext4 file system (Ubuntu running Linux kernel 2.6.31-22-server x86_64). This file system is the second drive on a Drobo box plugged in via USB. We've not had problems on the first drive (Drobo limits drive size to 2TB due to some OS limitations, so if you have more space than that it appears as two separate drives). I am sharing this files with Samba (smbd 3.4.0) with a mix of Windows and Linux workstations. Recently we've been experiencing some data corruption in multiple files. In many cases I have an un-corrupt original file stored on one of the workstations. These are binary files of various formats, (e.g. SQLite, but others as well). I used "split" to split a corrupt and uncorrupt file into 4096 byte chunks (this is the block size of the ext4 file system). I then ran md5sum on pairs of chunks and discovered that the chunks matched in many cases and in every case where they did not match, the corrupt chunk was a solid chunk of zeroes (620f0b67a91f7f74151bc5be745b7110 for what it's worth). I'm trying to track down a culprit but am a bit at a loss. I don't believe Samba is at fault since I'm using it without issue on the first drive exported by the Drobo. What can I do to narrow this down and find out what's going on?

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Css absolute position don't work in MS WORD

- by Tim

Hello! This is a sample: <html> <head> <title>word test</title> </head> <body> <div style='position: absolute; width: 30px; height: 50px; top: 100px; left: 20px; border-color: black; border-width: 1px; border-style: solid;'> <p>Hello!</p> </div> </body> </html> Save it as "word.doc" and open in MS WORD. Absolute position don't work! Div is rendered on the top of document and with 100% width. Why? I can't use a html tables. Version on ms word: 2003

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SPARC T5-4 LDoms for RAC and WebLogic Clusters

- by Jeff Taylor-Oracle

I wanted to use two Oracle SPARC T5-4 servers to simultaneously host both Oracle RAC and a WebLogic Server Cluster. I chose to use Oracle VM Server for SPARC to create a cluster like this: There are plenty of trade offs and decisions that need to be made, for example: Rather than configuring the system by hand, you might want to use an Oracle SuperCluster T5-8 My configuration is similar to jsavit's: Availability Best Practices - Example configuring a T5-8 but I chose to ignore some of the advice. Maybe I should have included an alternate service domain, but I decided that I already had enough redundancy Both Oracle SPARC T5-4 servers were to be configured like this: Cntl 0.25 4 64GB App LDom 2.75 CPU's 44 cores 704 GB DB LDom One CPU 16 cores 256 GB The systems started with everything in the primary domain: # ldm list NAME STATE FLAGS CONS VCPU MEMORY UTIL NORM UPTIME primary active -n-c-- UART 512 1023G 0.0% 0.0% 11m # ldm list-spconfig factory-default [current] primary # ldm list -o core,memory,physio NAME primary CORE CID CPUSET 0 (0, 1, 2, 3, 4, 5, 6, 7) 1 (8, 9, 10, 11, 12, 13, 14, 15) 2 (16, 17, 18, 19, 20, 21, 22, 23) -- SNIP 62 (496, 497, 498, 499, 500, 501, 502, 503) 63 (504, 505, 506, 507, 508, 509, 510, 511) MEMORY RA PA SIZE 0x30000000 0x30000000 255G 0x80000000000 0x80000000000 256G 0x100000000000 0x100000000000 256G 0x180000000000 0x180000000000 256G # Give this memory block to the DB LDom IO DEVICE PSEUDONYM OPTIONS pci@300 pci_0 pci@340 pci_1 pci@380 pci_2 pci@3c0 pci_3 pci@400 pci_4 pci@440 pci_5 pci@480 pci_6 pci@4c0 pci_7 pci@300/pci@1/pci@0/pci@6 /SYS/RCSA/PCIE1 pci@300/pci@1/pci@0/pci@c /SYS/RCSA/PCIE2 pci@300/pci@1/pci@0/pci@4/pci@0/pci@c /SYS/MB/SASHBA0 pci@300/pci@1/pci@0/pci@4/pci@0/pci@8 /SYS/RIO/NET0 pci@340/pci@1/pci@0/pci@6 /SYS/RCSA/PCIE3 pci@340/pci@1/pci@0/pci@c /SYS/RCSA/PCIE4 pci@380/pci@1/pci@0/pci@a /SYS/RCSA/PCIE9 pci@380/pci@1/pci@0/pci@4 /SYS/RCSA/PCIE10 pci@3c0/pci@1/pci@0/pci@e /SYS/RCSA/PCIE11 pci@3c0/pci@1/pci@0/pci@8 /SYS/RCSA/PCIE12 pci@400/pci@1/pci@0/pci@e /SYS/RCSA/PCIE5 pci@400/pci@1/pci@0/pci@8 /SYS/RCSA/PCIE6 pci@440/pci@1/pci@0/pci@e /SYS/RCSA/PCIE7 pci@440/pci@1/pci@0/pci@8 /SYS/RCSA/PCIE8 pci@480/pci@1/pci@0/pci@a /SYS/RCSA/PCIE13 pci@480/pci@1/pci@0/pci@4 /SYS/RCSA/PCIE14 pci@4c0/pci@1/pci@0/pci@8 /SYS/RCSA/PCIE15 pci@4c0/pci@1/pci@0/pci@4 /SYS/RCSA/PCIE16 pci@4c0/pci@1/pci@0/pci@c/pci@0/pci@c /SYS/MB/SASHBA1 pci@4c0/pci@1/pci@0/pci@c/pci@0/pci@4 /SYS/RIO/NET2 Added an additional service processor configuration: # ldm add-spconfig split # ldm list-spconfig factory-default primary split [current] And removed many of the resources from the primary domain: # ldm start-reconf primary # ldm set-core 4 primary # ldm set-memory 32G primary # ldm rm-io pci@340 primary # ldm rm-io pci@380 primary # ldm rm-io pci@3c0 primary # ldm rm-io pci@400 primary # ldm rm-io pci@440 primary # ldm rm-io pci@480 primary # ldm rm-io pci@4c0 primary # init 6 Needed to add resources to the guest domains: # ldm add-domain db # ldm set-core cid=`seq -s"," 48 63` db # ldm add-memory mblock=0x180000000000:256G db # ldm add-io pci@480 db # ldm add-io pci@4c0 db # ldm add-domain app # ldm set-core 44 app # ldm set-memory 704G app # ldm add-io pci@340 app # ldm add-io pci@380 app # ldm add-io pci@3c0 app # ldm add-io pci@400 app # ldm add-io pci@440 app Needed to set up services: # ldm add-vds primary-vds0 primary # ldm add-vcc port-range=5000-5100 primary-vcc0 primary Needed to add a virtual network port for the WebLogic application domain: # ipadm NAME CLASS/TYPE STATE UNDER ADDR lo0 loopback ok -- -- lo0/v4 static ok -- ... lo0/v6 static ok -- ... net0 ip ok -- ... net0/v4 static ok -- xxx.xxx.xxx.xxx/24 net0/v6 addrconf ok -- .... net0/v6 addrconf ok -- ... net8 ip ok -- -- net8/v4 static ok -- ... # dladm show-phys LINK MEDIA STATE SPEED DUPLEX DEVICE net1 Ethernet unknown 0 unknown ixgbe1 net0 Ethernet up 1000 full ixgbe0 net8 Ethernet up 10 full usbecm2 # ldm add-vsw net-dev=net0 primary-vsw0 primary # ldm add-vnet vnet1 primary-vsw0 app Needed to add a virtual disk to the WebLogic application domain: # format Searching for disks...done AVAILABLE DISK SELECTIONS: 0. c0t5000CCA02505F874d0 <HITACHI-H106060SDSUN600G-A2B0-558.91GB> /scsi_vhci/disk@g5000cca02505f874 /dev/chassis/SPARC_T5-4.AK00084038/SYS/SASBP0/HDD0/disk 1. c0t5000CCA02506C468d0 <HITACHI-H106060SDSUN600G-A2B0-558.91GB> /scsi_vhci/disk@g5000cca02506c468 /dev/chassis/SPARC_T5-4.AK00084038/SYS/SASBP0/HDD1/disk 2. c0t5000CCA025067E5Cd0 <HITACHI-H106060SDSUN600G-A2B0-558.91GB> /scsi_vhci/disk@g5000cca025067e5c /dev/chassis/SPARC_T5-4.AK00084038/SYS/SASBP0/HDD2/disk 3. c0t5000CCA02506C258d0 <HITACHI-H106060SDSUN600G-A2B0-558.91GB> /scsi_vhci/disk@g5000cca02506c258 /dev/chassis/SPARC_T5-4.AK00084038/SYS/SASBP0/HDD3/disk Specify disk (enter its number): ^C # ldm add-vdsdev /dev/dsk/c0t5000CCA02506C468d0s2 HDD1@primary-vds0 # ldm add-vdisk HDD1 HDD1@primary-vds0 app Add some additional spice to the pot: # ldm set-variable auto-boot\\?=false db # ldm set-variable auto-boot\\?=false app # ldm set-var boot-device=HDD1 app Bind the logical domains: # ldm bind db # ldm bind app At the end of the process, the system is set up like this: # ldm list -o core,memory,physio NAME primary CORE CID CPUSET 0 (0, 1, 2, 3, 4, 5, 6, 7) 1 (8, 9, 10, 11, 12, 13, 14, 15) 2 (16, 17, 18, 19, 20, 21, 22, 23) 3 (24, 25, 26, 27, 28, 29, 30, 31) MEMORY RA PA SIZE 0x30000000 0x30000000 32G IO DEVICE PSEUDONYM OPTIONS pci@300 pci_0 pci@300/pci@1/pci@0/pci@6 /SYS/RCSA/PCIE1 pci@300/pci@1/pci@0/pci@c /SYS/RCSA/PCIE2 pci@300/pci@1/pci@0/pci@4/pci@0/pci@c /SYS/MB/SASHBA0 pci@300/pci@1/pci@0/pci@4/pci@0/pci@8 /SYS/RIO/NET0 ------------------------------------------------------------------------------ NAME app CORE CID CPUSET 4 (32, 33, 34, 35, 36, 37, 38, 39) 5 (40, 41, 42, 43, 44, 45, 46, 47) 6 (48, 49, 50, 51, 52, 53, 54, 55) 7 (56, 57, 58, 59, 60, 61, 62, 63) 8 (64, 65, 66, 67, 68, 69, 70, 71) 9 (72, 73, 74, 75, 76, 77, 78, 79) 10 (80, 81, 82, 83, 84, 85, 86, 87) 11 (88, 89, 90, 91, 92, 93, 94, 95) 12 (96, 97, 98, 99, 100, 101, 102, 103) 13 (104, 105, 106, 107, 108, 109, 110, 111) 14 (112, 113, 114, 115, 116, 117, 118, 119) 15 (120, 121, 122, 123, 124, 125, 126, 127) 16 (128, 129, 130, 131, 132, 133, 134, 135) 17 (136, 137, 138, 139, 140, 141, 142, 143) 18 (144, 145, 146, 147, 148, 149, 150, 151) 19 (152, 153, 154, 155, 156, 157, 158, 159) 20 (160, 161, 162, 163, 164, 165, 166, 167) 21 (168, 169, 170, 171, 172, 173, 174, 175) 22 (176, 177, 178, 179, 180, 181, 182, 183) 23 (184, 185, 186, 187, 188, 189, 190, 191) 24 (192, 193, 194, 195, 196, 197, 198, 199) 25 (200, 201, 202, 203, 204, 205, 206, 207) 26 (208, 209, 210, 211, 212, 213, 214, 215) 27 (216, 217, 218, 219, 220, 221, 222, 223) 28 (224, 225, 226, 227, 228, 229, 230, 231) 29 (232, 233, 234, 235, 236, 237, 238, 239) 30 (240, 241, 242, 243, 244, 245, 246, 247) 31 (248, 249, 250, 251, 252, 253, 254, 255) 32 (256, 257, 258, 259, 260, 261, 262, 263) 33 (264, 265, 266, 267, 268, 269, 270, 271) 34 (272, 273, 274, 275, 276, 277, 278, 279) 35 (280, 281, 282, 283, 284, 285, 286, 287) 36 (288, 289, 290, 291, 292, 293, 294, 295) 37 (296, 297, 298, 299, 300, 301, 302, 303) 38 (304, 305, 306, 307, 308, 309, 310, 311) 39 (312, 313, 314, 315, 316, 317, 318, 319) 40 (320, 321, 322, 323, 324, 325, 326, 327) 41 (328, 329, 330, 331, 332, 333, 334, 335) 42 (336, 337, 338, 339, 340, 341, 342, 343) 43 (344, 345, 346, 347, 348, 349, 350, 351) 44 (352, 353, 354, 355, 356, 357, 358, 359) 45 (360, 361, 362, 363, 364, 365, 366, 367) 46 (368, 369, 370, 371, 372, 373, 374, 375) 47 (376, 377, 378, 379, 380, 381, 382, 383) MEMORY RA PA SIZE 0x30000000 0x830000000 192G 0x4000000000 0x80000000000 256G 0x8080000000 0x100000000000 256G IO DEVICE PSEUDONYM OPTIONS pci@340 pci_1 pci@380 pci_2 pci@3c0 pci_3 pci@400 pci_4 pci@440 pci_5 pci@340/pci@1/pci@0/pci@6 /SYS/RCSA/PCIE3 pci@340/pci@1/pci@0/pci@c /SYS/RCSA/PCIE4 pci@380/pci@1/pci@0/pci@a /SYS/RCSA/PCIE9 pci@380/pci@1/pci@0/pci@4 /SYS/RCSA/PCIE10 pci@3c0/pci@1/pci@0/pci@e /SYS/RCSA/PCIE11 pci@3c0/pci@1/pci@0/pci@8 /SYS/RCSA/PCIE12 pci@400/pci@1/pci@0/pci@e /SYS/RCSA/PCIE5 pci@400/pci@1/pci@0/pci@8 /SYS/RCSA/PCIE6 pci@440/pci@1/pci@0/pci@e /SYS/RCSA/PCIE7 pci@440/pci@1/pci@0/pci@8 /SYS/RCSA/PCIE8 ------------------------------------------------------------------------------ NAME db CORE CID CPUSET 48 (384, 385, 386, 387, 388, 389, 390, 391) 49 (392, 393, 394, 395, 396, 397, 398, 399) 50 (400, 401, 402, 403, 404, 405, 406, 407) 51 (408, 409, 410, 411, 412, 413, 414, 415) 52 (416, 417, 418, 419, 420, 421, 422, 423) 53 (424, 425, 426, 427, 428, 429, 430, 431) 54 (432, 433, 434, 435, 436, 437, 438, 439) 55 (440, 441, 442, 443, 444, 445, 446, 447) 56 (448, 449, 450, 451, 452, 453, 454, 455) 57 (456, 457, 458, 459, 460, 461, 462, 463) 58 (464, 465, 466, 467, 468, 469, 470, 471) 59 (472, 473, 474, 475, 476, 477, 478, 479) 60 (480, 481, 482, 483, 484, 485, 486, 487) 61 (488, 489, 490, 491, 492, 493, 494, 495) 62 (496, 497, 498, 499, 500, 501, 502, 503) 63 (504, 505, 506, 507, 508, 509, 510, 511) MEMORY RA PA SIZE 0x80000000 0x180000000000 256G IO DEVICE PSEUDONYM OPTIONS pci@480 pci_6 pci@4c0 pci_7 pci@480/pci@1/pci@0/pci@a /SYS/RCSA/PCIE13 pci@480/pci@1/pci@0/pci@4 /SYS/RCSA/PCIE14 pci@4c0/pci@1/pci@0/pci@8 /SYS/RCSA/PCIE15 pci@4c0/pci@1/pci@0/pci@4 /SYS/RCSA/PCIE16 pci@4c0/pci@1/pci@0/pci@c/pci@0/pci@c /SYS/MB/SASHBA1 pci@4c0/pci@1/pci@0/pci@c/pci@0/pci@4 /SYS/RIO/NET2 Start the domains: # ldm start app LDom app started # ldm start db LDom db started Make sure to start the vntsd service that was created, above. # svcs -a | grep ldo disabled 8:38:38 svc:/ldoms/vntsd:default online 8:38:58 svc:/ldoms/agents:default online 8:39:25 svc:/ldoms/ldmd:default # svcadm enable vntsd Now use the MAC address to configure the Solaris 11 Automated Installation. Database Logical Domain # telnet localhost 5000 {0} ok devalias screen /pci@4c0/pci@1/pci@0/pci@c/pci@0/pci@7/display@0 disk7 /pci@4c0/pci@1/pci@0/pci@c/pci@0/pci@c/scsi@0/disk@p3 disk6 /pci@4c0/pci@1/pci@0/pci@c/pci@0/pci@c/scsi@0/disk@p2 disk5 /pci@4c0/pci@1/pci@0/pci@c/pci@0/pci@c/scsi@0/disk@p1 disk4 /pci@4c0/pci@1/pci@0/pci@c/pci@0/pci@c/scsi@0/disk@p0 scsi1 /pci@4c0/pci@1/pci@0/pci@c/pci@0/pci@c/scsi@0 net3 /pci@4c0/pci@1/pci@0/pci@c/pci@0/pci@4/network@0,1 net2 /pci@4c0/pci@1/pci@0/pci@c/pci@0/pci@4/network@0 virtual-console /virtual-devices/console@1 name aliases {0} ok boot net2 Boot device: /pci@4c0/pci@1/pci@0/pci@c/pci@0/pci@4/network@0 File and args: 1000 Mbps full duplex Link up Requesting Internet Address for xx:xx:xx:xx:xx:xx Requesting Internet Address for xx:xx:xx:xx:xx:xx WLS Logical Domain # telnet localhost 5001 {0} ok devalias hdd1 /virtual-devices@100/channel-devices@200/disk@0 vnet1 /virtual-devices@100/channel-devices@200/network@0 net /virtual-devices@100/channel-devices@200/network@0 disk /virtual-devices@100/channel-devices@200/disk@0 virtual-console /virtual-devices/console@1 name aliases {0} ok boot net Boot device: /virtual-devices@100/channel-devices@200/network@0 File and args: Requesting Internet Address for xx:xx:xx:xx:xx:xx Requesting Internet Address for xx:xx:xx:xx:xx:xx Repeat the process for the second SPARC T5-4, install Solaris, RAC and WebLogic Cluster, and you are ready to go. Maybe buying a SuperCluster would have been easier.

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What do you upgrade to make games load faster? [on hold]

- by Superbest

Let's say you have a relatively modern game like Shogun 2. The loading screens take several minutes. This bothers you and you'd like to improve it. What is actually going on when loading screens are up? I'm guessing assets are being loaded into memory from disk, and possibly being decompressed first. However, what is actually causing the slow down? The memory? Mainboard? CPU? HDD? If you had $100 to spend on upgrades and your only goal is to speed up loading screens without reducing other performance, what component of the computer does it make sense to upgrade for maximum benefit? If your answer is "it depends on the existing setup", what sort of benchmarks would you run to determine what is causing the bottleneck? What if you had $500 instead? I give the two budgets for context. I am not asking for actual recommendations about which component to buy (nor are the numbers supposed to be rigid limits), but what features are important when shopping for components with small and large budgets (a large budget could allow buying multiple components which are not so good on their own, but work particularly well together). I mention Shogun 2 as an example, but I'm asking about reducing overall loading times, across all games, not just one game. Therefore, "put it on a solid state disk" probably won't be good solution, because putting every game on your SDD will quickly fill it up.

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Media Center setup won't complete for watching TV

- by Robert

I have a problem watching TV in Media Center. The TV constantly pauses 1/2 second then plays 1 second, pauses 1/2 second, plays 1 second - it is constant and does not vary. This problem occurs on all channels, live or recorded. The bottom 5th of the screen is solid green. I know the problem is Media Center because I can use Pinnacle's TVCenterPro and there is no skipping/pausing (and not green on bottom). I was using cable, and switched to DirecTV (satellite). Trying to do "Set up TV signal" in Media Center seems to be what broke it. I get an error "IR Hardware not detected." I can use the remote to "try again" - so the IR hardware works fine (Media Center's remote/sensor). I tried plugging the IR Blaster into both ports, and I tried a different USB port for the IR receiver. I can't complete the setup. Media Center was playing it okay before I tried to run setup. (I ran setup to try to do recording with Media Center.) Pinnacle PCTV 800i HD PCI card (coax cable from DirecTV tuner), ATI Radeon HD 3200 Graphics, Windows XP SP3 Media Center Edition, AMD Athlon Dual Core 2.5 GHz, 1.75 GB RAM.

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Value of Itanium over x86_64 for Oracle Deployment

- by Antitribu

We are looking at a new environment to run our Oracle Database running on SUSE (potentially migrating to RedHat). Our database is approximately 100GB and performs adequately on our current hardware (x86_64) with approximately 6GB of ram allocated to it. We are growing quickly however and will require more performance shortly. Given the cost of Oracle licenses we would like to maximize the value from each license by choosing the most appropriate CPU to run the software on. The questions are: Are there substantial benefits to looking at Itanium hardware, are there any drawbacks? Is there a point where Itanium starts to scale out better? What are the long term support options for Itanium? Given the dominance of x86 would it be safer long term to stick with x86? On average what would be the performance benefit of implementing an Oracle database on Itanium over x86_64? Is this an issue at all or will other factors (IO/RAM) cap out first? If anyone can point me towards some solid documentation on comparisons between the two platforms that provides good case analysis of when to choose which I'm more than happy to accept that as an answer.

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Identifying Hard Drive as performance bottleneck for desktop machines

- by Programming Hero

I'm working in a development team where we all use laptops so we can work in multiple locations. These laptops are proving notoriously slow for development work, but at a glance they all look to have the specification for a much faster experience: CPU - Intel Core 2 Duo T7500 Memory - 2GB of RAM We all experience the biggest delays when the hard-drives are being accessed, particularly when swap-files are being thrashed. After doing a little bit of profile, a colleague discovered that our HDDs are seeing Read/Write speeds of about 10MB/sec. This seems abnormally low and we believe it the cause of the problem. Sensibly (though somewhat annoyingly) our business wont blow money on faster drives just to see if it fixes the problem; we need to illustrate this is definitely the problem and that buying some solid-state drives will make it go away. I need some way of showing how 90% of the system resources aren't being used over the course of a day, and that whenever there is utilization, it's all in HDD reads or writes. Are there any tools I could use to provide this information? Does it seem likely the problem is going to be fixed by a faster drive? Should I be looking for alternatives?

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rsyslog - template - regex data for insertion into db

- by Mike Purcell

I've been googling around the last few days looking for a solid example of how to regex a log entry for desired data, which is then to be inserted into a database, but apparently my google-fu is lacking. What I am trying to do is track when an email is sent, and then track the remote mta response, specifically the dsn code. At this point I have two templates setup for each situation: # /etc/rsyslog.conf ... $Template tpl_custom_header, "MPurcell: CUSTOM HEADER Template: %msg%\n" $Template tpl_response_dsn, "MPurcell: RESPONSE DSN Template: %msg%\n" # /etc/rsyslog.d/mail if $programname == 'mail-myapp' then /var/log/mail/myapp.log if ($programname == 'mail-myapp') and ($msg contains 'X-custom_header') then /var/log/mail/test.log;tpl_custom_header if ($programname == 'mail-myapp') and ($msg contains 'dsn=') then /var/log/mail/test.log;tpl_response_dsn & ~ Example log entries: MPurcell: CUSTOM HEADER Template: D921940A1A: prepend: header X-custom_header: 101 from localhost[127.0.0.1]; from=<[email protected]> to=<[email protected]> proto=ESMTP helo=<localhost>: headername: message-id MPurcell: RESPONSE DSN Template: D921940A1A: to=<[email protected]>, relay=gmail-smtp-in.l.google.com[2607:f8b0:400e:c02::1a]:25, delay=2, delays=0.12/0.01/0.82/1.1, dsn=2.0.0, status=sent (250 2.0.0 OK 1372378600 o4si2828280pac.279 - gsmtp) From the CUSTOM HEADER Template I would like to extract: D921940A1A, and X-custom_header value; 101 From the RESPONSE DSN Template I would like to extract: D921940A1A, and "dsn=2.0.0"

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Slow boot for OS and external devices

- by Derek Van Cuyk

I have been having this problem intermittently but as of yesterday, it has become more consistent. It originally started when I rebooted my PC at home and the OS (Windows 8) sat in a loop appearing to do nothing while loading. I figured since this was a new installation, that something may have just become corrupted and I decided to reinstall. So I tried to boot off of the thumb drive which had the installation iso and encountered pretty much the same issue. Same with the DVD drive. So, I rebooted once again and left it to load the entire night just to see if it ever would and sure enough this morning, Windows had finally loaded. Authentication had the same roblem albeit not quite as long (took about 5 minutes to authenticate). However, once I was in, everything appeared to be working fine and as quick as normal with the exception of when I tried to scan the C drive for any errors, which ran unbearably slow (45 minutes and before I left for work and was not finished scanning a 64GB SSD drive). I mention that I have had this issue but never when loading the OS. Before it occurred when trying to install windows 7 from a different DVD drive than the one I have now. It took me about 3 hours to do it since I had to wait sometimes 30+ min for each step to finish processing. Does anyone have an idea as to what can cause this? I am assuming it is the motherboard since it is responsible for communication with all the devices I'm having issues with but I cannot find anyone else who has had a problem like this and don't want to drop more money on a MB if it isn't the problem. Hardware: Motherboard: Asus M4A78T-E Socket AM3/ AMD 790GX/ Hybrid CrossFireX Hard Drive: Kingston SSDNow V+180 64GB Micro SATA II 3GB/S 1.8 Inch Solid State Drive SVP180S2/64G Optical Drive: Samsung Blu-Ray Combo Internal 12XReadable and DVD-Writable Drive with Lightscribe SH-B123L/BSBP Thanks, Derek

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How to have SSL on Amazon Elastic Load Balancer with a Gunicorn EC2 server?

- by Riegie Godwin

I'm a self taught back end engineer so I'm learning all of this stuff as I go along. For the longest time, I've been using basic authentication for my users. Many developers are advising against this approach since each request will contain the username & password in clear text. Anyone with the right skills can sniff on the connection between my iOS application and my Django/Gunicorn Server and obtain their password. I wouldn't want to put my user's credentials at risk so I would like to implement a more secure way of authentication. SSL seems to be the most viable option. My server doesn't serve any static content or anything crazy of that sort. All the server does is send and receive "json" responses from and to my iOS application. Here is my current topology. iOS application ------ Amazon Elastic Load Balancer ------- EC2 Instances running HTTP Gunicorn. Gunicorn runs on port 8000. I have a CNAME record from GoDaddy for the Amazon Elastic Load Balancer DNS. So instead of using the long DNS to make requests, I just use server.example.com. To interact with my servers I send and receive requests to server.example.com:8000/ This setup works and has been solid. However I need to have a more secure way. I would like to setup SSL between my iOS application and my Elastic Load Balancer. How can I go about doing this? Since I am only sending json responses to my application, do I really need to buy a certificate from a CA or can I create my own? (since browsers will not be interacting with my servers. My servers are only designed to send json responses to my iOS application).

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Media Center setup won't complete for watching TV

- by Robert

I have a problem watching TV in Media Center. The TV constantly pauses 1/2 second then plays 1 second, pauses 1/2 second, plays 1 second - it is constant and does not vary. This problem occurs on all channels, live or recorded. The bottom 5th of the screen is solid green. I know the problem is Media Center because I can use Pinnacle's TVCenterPro to watch TV and there is no skipping/pausing (and not green on bottom). I was using cable, and switched to DirecTV (satellite). Trying to do "Set up TV signal" in Media Center seems to be what broke it. I get an error "IR Hardware not detected." I can use the remote to "try again" - so the IR hardware works fine (Media Center's remote/sensor). I tried plugging the IR Blaster into both ports, and I tried a different USB port for the IR receiver. I can't complete the setup. Media Center was playing TV okay (with the new DirecTV) before I tried to run setup. (I ran setup to try to do recording with Media Center.) Hardware/Software: Pinnacle PCTV 800i HD PCI card (coax cable from DirecTV tuner), ATI Radeon HD 3200 Graphics, Windows XP SP3 Media Center Edition, AMD Athlon Dual Core 2.5 GHz, 1.75 GB RAM.

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Authenticate VNC session with ConsolKit?

- by lori

I have a linux machine running Fedora 16 in a cupboard. It has no screen or keyboard. I connect to it using a combination of vnc and ssh. Recently, after an update, I have had issues with authentication on the machine. If I vnc to it, the kde desktop pops up an error dialog every few minutes saying Authorization failed. Failed to obtain authentication. If I plug in a USB drive it fails to mount, Dolphin reports an authentication issue again. I have had limited success finding the solution. AFAICT, it is an issue with ConsoleKit deeming me to be a non-local user so it prevents authentication. This is the output from ck-list-sessions: $ ck-list-sessions Session5: unix-user = '1000' realname = 'steve' seat = 'Seat6' session-type = '' active = FALSE x11-display = ':1' x11-display-device = '' display-device = '' remote-host-name = '' is-local = FALSE on-since = '2012-09-16T08:07:03.137011Z' login-session-id = '1' I have tried to update my .vnc/xstartup script to include ck-launch-session as follows: $ cat ~/.vnc/xstartup #!/bin/sh exec ck-launch-session vncconfig -iconic & unset SESSION_MANAGER unset DBUS_SESSION_BUS_ADDRESS export XKL_XMODMAP_DISABLE=1 OS=`uname -s` if [ $OS = 'Linux' ]; then case "$WINDOWMANAGER" in *gnome*) if [ -e /etc/SuSE-release ]; then PATH=$PATH:/opt/gnome/bin export PATH fi ;; esac fi if [ -x /etc/X11/xinit/xinitrc ]; then exec ck-launch-session /etc/X11/xinit/xinitrc fi if [ -f /etc/X11/xinit/xinitrc ]; then exec ck-launch-session sh /etc/X11/xinit/xinitrc fi [ -r $HOME/.Xresources ] && xrdb $HOME/.Xresources exec ck-launch-session xsetroot -solid grey exec ck-launch-session xterm -geometry 80x24+10+10 -ls -title "$VNCDESKTOP Desktop" & exec ck-launch-session twm & This has not helped. How can I either authenticate myself to ConsoleKit, or trick it into believing I am a local user?

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ESX hosts lose connectivity with iSCSI SAN LUNs

- by Themist

I've been experiencing this issue for a couple of months now where my ESX hosts lose connectivity with my iSCSI SAN vmfs volumes. As a results the ESX hosts enter a nonresponsive mode the associated VMs disconnect and the only remedy is to reboot the host. This issue happens randomly . I have escalated this issue with VMWare but I haven't had any solution to the issue yet. I see no errors on my switches and there are no hardware issues as well. My SAN infrastucture is solid and there are 2 paths for every vmfs volume. Did anybody else experienced a similar issue? edit: Here are some more details: The iSCSI SAN software is Datacore Sanmelody 2.0.4.2 running on 2 HP Proliant G5 servers. The storage attached to each of the servers is an HP MSA70 and all the iSCSI SAN Volumes that are presented to my 4 ESX hosts are mirrored. I have two iSCSI swithces HP Procurve 1800G-24 that are trunked together. My SANLELODY servers are using NC360T NICs. I team two NICs and have one cable connecting to each iSCSi switch. Each ESX server uses two NICs as well for the iSCSI Network.

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SkyDrive broken after upgrade to Windows 8.1: "This location can't be found, please try later"

- by avo

Upgrading from Windows 8 to Windows 8.1 via the Store upgrade path has screwed my SkyDrive. The C:\Users\<user name>\SkyDrive folder is empty (it only has single file desktop.ini). When I open the native (Store) SkyDrive app, I see "This location can't be found, please try later". I'm glad to still have my files alive online in my SkyDrive account. I tried disconneting from / reconnecting to my Microsoft Account with no luck. Anyone has an idea on how to fix this without reinstalling/refreshing Windows 8.1? From Event Viewer: Faulting application name: skydrive.exe, version: 6.3.9600.16412, time stamp: 0x5243d370 Faulting module name: unknown, version: 0.0.0.0, time stamp: 0x00000000 Exception code: 0x00000000 Fault offset: 0x0000000000000000 Faulting process ID: 0x4e8 Faulting application start time: 0x01cece256589c7ee Faulting application path: C:\Windows\System32\skydrive.exe Faulting module path: unknown Report ID: {...} Faulting package full name: Faulting package-relative application ID: Also: The machine-default permission settings do not grant Local Activation permission for the COM Server application with CLSID {C2F03A33-21F5-47FA-B4BB-156362A2F239} and APPID {316CDED5-E4AE-4B15-9113-7055D84DCC97} to the user NT AUTHORITY\LOCAL SERVICE SID (S-1-5-19) from address LocalHost (Using LRPC) running in the application container Unavailable SID (Unavailable). This security permission can be modified using the Component Services administrative tool. Never was a big fan of in-place upgrade anyway, but this time it was a machine which I use for work, with a lot of stuff already installed on it. Shouldn't have tried to upgrade it in the first place, but was convinced Windows 8.1 is a solid update. Another lesson learnt.

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Probability of Blade Chassis Failure

- by ChrisZZ

In my organisation we are thinking about buying blade servers - instead of rack servers. Of course technology vendors also make them sound very nice. A concern, that I read very often in different forums, is, that there is a theoretical possibility of the server chassis going down - which would in consequence take all the blades down. That is due to shared infrastructure. My reaction on this probability would be to have redundancy and by two chassis instead of one (very costly of course). Some people (including e.g. HP Vendors) try to convince us, that the chassis is very very unlikely to fail, due to many redundancies (redundant power supply, etc.). Another concern on my side is, that if something goes down, spare parts might be required - which is difficult in our location (Ethiopia). So I would ask to experienced administrators, that have managed blade server: What is your experience? Do they go down as a whole - and what is the sensible shared infrastructure, that might fail? That question could be extended to shared storage. Again I would say, that we need two storage units instead of only one - and again the vendors say, that this things are so rock solid, that no failure is expected. Well - I can hardly believe, that such a critical infrastructure can be very reliable without redundancy - but maybe you can tell me, whether you have successfull blade-based projects, that work without redundancy in its core parts (chassis, storage...) At the moment, we look at HP - as IBM looks much to expensive... thanks a lot best regards Christian

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What is the IPv6 equivalent to IPv4 RFC1918 addresses?

- by Kumba

Having a hard time wrapping my head around IPv6 here. A lot of the lingo seems targeted at enterprise-level IPv6 deployments, discussing link-local, site-local, global unicast, scopes, etc. Not a lot of solid information on really small networks, like home networks. I want to check my thinking and make sure I am getting the correct translations from IPv4-speak to IPv6-speak. The first question is, what's the equivalent of RFC1918 for IPv6? Initial searches suggested there was no equivalent. Then I stumbled upon Unique Local Addresses (RFC4193), and that states that all ULA's should be assigned the prefix fc00, followed by a 40-bit random number in the routing prefix. This random number is to "prevent collisions when two IPv6 networks are interconnected" -- again, another reference to an enterprise-level function. If I have a small local LAN at home, numbered using 192.168.4.0/24, what's my equivalent in IPv6's ULA scope? Assuming I will never, ever, tie that IPv6 address into the real internet (a router will NAT & firewall it), can I ignore the RFC to an extent and go with fc00::4:0/120? It also seems that any address in fc00::/7 are to be globally routable. Does this mean I'll need extra protections so my router would not automatically start advertising these private IPv6 addresses to the world? Second question, what's this link-local thing? Reading suggests a default-assigned address in the fe80::/10 range that has the last 64bits of the address comprised of the interface's MAC address. Seems to be required, too, but I'm annoyed by the constant discussion of it in relation to enterprise networks. Third question, what is scope id for? Seems to be yet another term tossed around in relation to enterprise networks, especially when interconnecting them, but almost no explanation on the smaller home network level. Can I see a scope ID AND CIDR notation used together? I.e., fc00::4:0/120%6, or are scope IDs only supposed to be applied to a single /128 IPv6 address?

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Feasibility of Windows Server 2008 DFS replication over WAN link

- by CesarGon

We have just set up a WAN link that connects two buildings in our organisation. The link is provided by a 100-Mbps point to point line. We have a Windows Server 2008 R2 domain controller on each side of the link. Now we are planning to set up DFS for file services across the organisation. The estimated data volume is over 2 TB, and will grow at approximately 20% annually. My idea is to set up a file server in each building and install DFS so that all the contents stay replicated over the 100-Mbps link. I hope that this will ensure that any user will be directed to the closest (and fastest) server when requesting a file from the DFS folders. My concern is whether a 100-Mbps WAN link is good enough to guarantee DFS replication. I've no experience with DFS, so any solid advice is welcome. The line is reliable (i.e. it doesn't crash often) and our data transfer tests show that a 5 MB/sec transfer rate is easily achieved. This is approximately 40% of the nominal bandwidth. I am also concerned about the latency. I mean, how long will users need to wait to see one change on one side of the link after the change has been made on the other side. My questions are: Is this link between networks a reliable infrastructure on which to set up DFS replication? What latency times would be typical (seconds, minutes, hours, days)? Would you recommend that we go for DFS in this scenario, or is there a better alternative? Many thanks.

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