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• High IOWait executing JBoss 3.2.7

  - by user64205

  Server Details: Kernel: Linux wiq31 2.4.21-9.ELsmp #1 SMP Thu Jan 8 17:08:56 EST 2004 i686 i686 i386 GNU/Linux CPU: 4 x Intel(R) Xeon(TM) CPU 3.06GHz Memory: 1028520 kB JBoss version: 3.2.7 Every time i try to start JBoss, in all CPU's, the iowait values starts to raise and the idle values starts to fall. Before executing my JBoss application, the free command returns the following output: *total used free shared buffers cached Mem: 1028520 966400 62120 0 187756 538928 -/+ buffers/cache: 239716 788804 Swap: 2044072 790672 1253400* After starting my JBoss application, the free command returns the following output: *total used free shared buffers cached Mem: 1028520 1007648 20872 0 187116 524084 -/+ buffers/cache: 296448 732072 Swap: 2044072 819096 1224976* After starting my JBoss application, without answering any request, the java process /proc/PID/status file have the following values: State: S (sleeping) SleepAVG: 27% Tgid: 24022 Pid: 24022 PPid: 21011 TracerPid: 0 Uid: 500 500 500 500 Gid: 500 500 500 500 FDSize: 256 Groups: 500 VmSize: 775200 kB VmLck: 0 kB VmRSS: 156752 kB VmData: 696752 kB VmStk: 36 kB VmExe: 21 kB VmLib: 710375 kB StaBrk: 0804f000 kB Brk: 095bb000 kB StaStk: bffff8c0 kB ExecLim: ffffffff Threads: 62 SigPnd: 0000000000000000 ShdPnd: 0000000000000000 SigBlk: 0000000000000000 SigIgn: 0000000000000000 SigCgt: 1000000180015ccf CapInh: 0000000000000000 CapPrm: 0000000000000000 CapEff: 0000000000000000 Is this behavior being caused by memory swapping, or the short memory available in the server is enough to run my application?

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• How to create btrfs RAID-1 filesystem (assertion error in mkfs.btrfs)?

  - by amcnabb

  I tried to make a btrfs RAID-1 filesystem in "degraded mode" by following the btrfs UseCases instructions but hit a fatal assertion error. Why is this failing, and is there any workaround? The instructions I followed are at: https://btrfs.wiki.kernel.org/articles/u/s/e/UseCases_8bd8.html The output of the mkfs.btrfs and btrfs filesystem show commands is: # mkfs.btrfs -m raid1 -d raid1 /dev/sdd1 /dev/loop1 WARNING! - Btrfs Btrfs v0.19 IS EXPERIMENTAL WARNING! - see http://btrfs.wiki.kernel.org before using failed to read /dev/sr0 adding device /dev/loop1 id 2 mkfs.btrfs: volumes.c:802: btrfs_alloc_chunk: Assertion `!(ret)' failed. zsh: abort (core dumped) mkfs.btrfs -m raid1 -d raid1 /dev/sdd1 /dev/loop1 # btrfs filesystem show failed to read /dev/sr0 Label: none uuid: 773908b8-acca-4c30-85c5-6642b06de22b Total devices 1 FS bytes used 28.00KB devid 1 size 223.13GB used 2.04GB path /dev/sda5 Label: none uuid: 0f06f1a8-5f5f-4b92-a55c-b827bcbcc840 Total devices 2 FS bytes used 24.00KB devid 2 size 2.00GB used 0.00 path /dev/loop1 devid 1 size 1.36TB used 20.00MB path /dev/sdd1 Btrfs Btrfs v0.19 # EDIT: It turns out that the filesystem isn't mountable: # mount /dev/sdd1 /mnt/big2 mount: wrong fs type, bad option, bad superblock on /dev/sdd1, missing codepage or helper program, or other error In some cases useful info is found in syslog - try dmesg | tail or so # So, why did the mkfs fail, and is there any workaround?

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• Gnome 3 gdm fails to start after preupgrade from fedora 14 to 15

  - by digital illusion

  I'm not able to boot fedora 15 in runlevel 5. After all services start, when the login screen should appear, gdm just show a mouse waiting cursor and keeps restarting itself. From /var/log/gdm/\:0-greeter.log Gtk-Message: Failed to load module "pk-gtk-module" /usr/bin/gnome-session: symbol lookup error: /usr/lib/gtk-3.0/modules/libatk-bridge.so: undefined symbol: atk_plug_get_type /usr/libexec/gnome-setting-daemon: symbol lookup error: /usr/lib/gtk-3.0modules/libatk-bridge.so: undefined symbol: atk_plug_get_type Where should atk_plug_get_type be defined? Edit: Here a better description of the error (system-config-network-gui:2643): Gnome-WARNING **: Accessibility: failed to find module 'libgail-gnome' which is needed to make this application accessible /usr/bin/python: symbol lookup error: /usr/lib/gtk-2.0/modules/libatk-bridge.so: undefined symbol: atk_plug_get_type Why there are still references to gtk2? Did preupgrade fail? Attaching upgrade log... it seems gdm was not added, but it is present in the users and groups list. May 26 11:25:52 sysimage sendmail[1076]: alias database /etc/aliases rebuilt by root May 26 11:25:52 sysimage sendmail[1076]: /etc/aliases: 77 aliases, longest 23 bytes, 795 bytes total May 26 11:46:09 sysimage useradd[1793]: failed adding user 'dbus', data deleted May 26 11:53:37 sysimage systemd-machine-id-setup[2443]: Initializing machine ID from D-Bus machine ID. May 26 11:55:28 sysimage useradd[2835]: failed adding user 'apache', data deleted May 26 11:55:38 sysimage useradd[2842]: failed adding user 'haldaemon', data deleted May 26 11:55:43 sysimage useradd[2848]: failed adding user 'smolt', data deleted May 26 11:57:32 sysimage sendmail[3032]: alias database /etc/aliases rebuilt by root May 26 11:57:32 sysimage sendmail[3032]: /etc/aliases: 77 aliases, longest 23 bytes, 795 bytes total May 26 11:57:46 sysimage groupadd[3066]: group added to /etc/group: name=cgred, GID=482 May 26 11:57:47 sysimage groupadd[3066]: group added to /etc/gshadow: name=cgred May 26 11:57:47 sysimage groupadd[3066]: new group: name=cgred, GID=482 May 26 11:58:42 sysimage useradd[3086]: failed adding user 'ntp', data deleted May 26 12:00:13 sysimage dbus: avc: received policyload notice (seqno=2) May 26 12:15:08 sysimage useradd[4950]: failed adding user 'gdm', data deleted May 26 12:24:39 sysimage dbus: avc: received policyload notice (seqno=3) May 26 12:25:24 sysimage useradd[5522]: failed adding user 'mysql', data deleted May 26 12:25:37 sysimage useradd[5533]: failed adding user 'rpcuser', data deleted May 26 12:26:31 sysimage useradd[5592]: failed adding user 'tcpdump', data deleted Any suggestions before I revert installation to F14?

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• Router recommendation to virtualize 800 IPs

  - by delerious010

  I've recently been looking at getting some new load balancers for our environment as we are expecting to double our client base in the next 12 months. Currently we have 400 public IPS serving 800 clusters ( 2 clusters / IP due to ports ) on Coyote Point Balancers, and distributing connections to 3 web servers serving about 6GBytes outgoing, 2Gbytes in per day. If we double, this would be about 800 IPs, possibly 1600 clusters, and about 6 servers per cluster ( for a total of 9600 so called "real servers" using Barracuda's lingo ). Due to the amount of clusters, most solutions I've looked at ( Coyote, Barracuda, Loadbalancer.org ) seem to be unsure whether they'll be able to handle our planned growth, mostly due to health checks performed on the servers ... which makes total sense when you think of it. So the fine folk at loadbalancer.org recommended that we may be better off offload the 400-800 public IPs, which we require for SSL eCommerce solutions, over to a forward facing router. From that point on, the router could do some mangling to route EXT_IP:443 to INT_IP:INT_PORT which would then allow us to reduce the Load Balancer configuration to 1 or 2 clusters, thus resolving the health check problem. Does this idea make sense to yall ? Or would you have other recommendations to make ? Secondly, what router would you recommend for such an undertaking ? I'd be looking at something that has some form of failover mechanism built in. On a totally unrelated note, I've got to admit that I'm extremely pleased with the responses I got from loadbalancer.org. Their responses to my inquiries were surprisingly helpful ( i.e. I didn't feel as if I was taking to a sales guy trying to push something ). ( No I don't work for them, and sadly nor are they sending me free gear ).

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• Oracle Database Recovery Problem

  - by Palani

  I am very new to Oracle, and trying to restore a oracle 8i database on win 2000 server. I have one week old database backup (backup taken with exp command), and i want to restore it now. Now I am unable to login through sqlplus (got shutdown in progress error) I have a backup and i want to restore it, but oracle is not starting at all, and 'imp' command is failing. I started sqlplus / as sysdba and following is the log of what i am trying to do. Can some one guide me further. SQL> shutdown immediate; ORA-01109: database not open Database dismounted. ORACLE instance shut down. SQL> startup; ORACLE instance started. Total System Global Area 143423516 bytes Fixed Size 75804 bytes Variable Size 58105856 bytes Database Buffers 85164032 bytes Redo Buffers 77824 bytes Database mounted. ORA-01589: must use RESETLOGS or NORESETLOGS option for database open SQL> shutdown immediate; ORA-01109: database not open Database dismounted. ORACLE instance shut down. SQL> startup mount; ORACLE instance started. Total System Global Area 143423516 bytes Fixed Size 75804 bytes Variable Size 58105856 bytes Database Buffers 85164032 bytes Redo Buffers 77824 bytes Database mounted. SQL> alter database open; alter database open * ERROR at line 1: ORA-01589: must use RESETLOGS or NORESETLOGS option for database open SQL> alter database open resetlogs; alter database open resetlogs * ERROR at line 1: ORA-01245: offline file 1 will be lost if RESETLOGS is done ORA-01110: data file 1: 'C:\ORACLE\ORADATA\ABCD\SYSTEM01.DBF'

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• Why won't this script accept any arguments?

  - by Nate Wagar

  I'm trying to write an SVN post-commit hook and, strangely, am getting hung up on what should be the easiest part. The Script: set REPO="$1" set REV="$2" set SVNBIN="/opt/CollabNet_Subversion/bin/" set SSHBIN="/usr/bin/ssh" set HOST="staging.domain.net" set timeout=30 set USERNAME="svn-usr" set E_NO_CONNECT=2 set E_WRONG_PASS=3 set E_UNKOWN=25 set CHANGED=`"$SVNBIN"svnlook changed --revision $REV $REPOS` echo "Here are changes: $CHANGED" >> /var/svn/repos/www/logs/testing echo "Command: $0; Repo: $REPO; Rev: $REV; Total: $#" >> /var/svn/repos/www/logs/testing set PROJECT "" Yet when I call it, it doesn't seem to be seeing the arguments I pass to it: /var/svn/repos/www/logs> sudo ../hooks/post-commit /var/svn/repos/www 33 svnlook: missing argument: --revision Type 'svnlook help' for usage. /var/svn/repos/www/logs> cat testing Here are changes: Command: ../hooks/post-commit; Repo: ; Rev: ; Total: 1 This is on a Solaris 10 SPARC box. I'm a bit of a script newbie, but shouldn't this be really easy??

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• Replicated MongoDB server slower than simple shards

  - by displayName

  I tried to compare the performance of a sharded configuration against a sharded and replicated configuration. The sharded configuration consists of 8 shards each running on three different machines thereby constituting a total of 24 shards. All 8 of these shards run in the same partition on each machine. The sharded and replicated version is 8 shards again just like plain sharding, and all 8 mongods run on the same partition in each machine. But apart from this, each of these three machine now run additional 16 threads on another partition which serve as the secondary for the 8 mongods running on other machines. This is the way I prepared a sharded and replicated configuration with data chunks having replication factor of 3. Important point to note is that once the data has been loaded, it is not modified. So after primary and secondaries have synchronized then it doesn't matter which one i read from. To run the queries, I use an entirely different machine (let's call it config) which runs mongos and this machine's only purpose is to receive queries and run them on the cluster. Contrary to my expectations, plain sharding of 8 threads on each machine (total = 3 * 8 = 24) is performing better for queries than the sharded + replicated configuration. I have a script written to perform the query. So in order to time the scripts, I use time ./testScript and see the result. I tried changing the reading preference for replicated cluster by logging to mongo of config and run db.getMongo().setReadPref('secondary') and then exit the shell and run the queries like time ./testScript. The questions are: Where am i going wrong in the replication? Why is it slower than its plain sharding version? Does the db.getMongo().ReadPref('secondary') persist when i leave the shell and try to perform the query? All the four machines are running Linux and i have already increased the ulimit -n to 2048 from initial value of 1024 to allow more connections. The collections are properly distributed and all the mongods have equal number of chunks. Goes without saying that indices in both configurations are the same.

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• Excel Help: Data Input Help

  - by B-Ballerl

  Everyday I download data from a site that will have rows each filled with individual data for clients. I'm able to input the data into excel as a whole but after that I'm having trouble figuring out how to put it into a chart. For example Web visits time. So say Client 1 stayed for 5 min increasing his total time on the site to 20 min and Client 2 stayed for 0 min keeping his time of 10 min and they were both registered on new years eve, and R1's last login was today and R2's was yesterday. (R for some reason repersents Client, no idea why...). Client 3 hasn't been on since he registered keeping his total at 4 min So my data would look something like this for Today (20110104) R1,20101231,20110104,20 R2,20101231,20110103,10 R3,20101231,20101231,4 And this for the day before (201101030), R1,20101231,20110102,15 R2,20101231,20110103,10 R3,20101231,20101231,4 I get about 200+ client rows each day where even the names of the Client list are changing. Is it possible to import the data each day and fill it in a excel sheet where the Client number is off on the left hand side in a table, and the amount of time (Whole Number ex. 4) each day it spends on the site extend to the right under it's specific date see Picture? I've manage to create a manual sheet but have been unsucessful at getting excel to do any of it for me. Here are two pictures:

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• Tripwire help Required

  - by ramaperumal

  I have created the policy file in Tripwire and also I have created the rules as well mentioned below: /opt/jboss/server/gis/conf -> $(SEC_CONFIG) +aipm +c+g+a+i+s+t+u+l+M; /usr/local/gtech/eseries/ -> $(SEC_CONFIG) +a+c+g+i+s+t+u+l+M ; After running the integrity check the output should be a(Access timestamp),c (Inode timestamp (create/modify),g (File owner's group ID),i (Inode number),s (File size),t (time stamp),u (File owner's user ID),l(File is increasing in size (a "growing file"),M (MD5 hash value). I am getting the output as below: [root@xxsi1242 tripwire]# tripwire --check Parsing policy file: /etc/tripwire/tw.pol *** Processing Unix File System *** Performing integrity check... Wrote report file: /var/lib/tripwire/report/xxsi1242.gtk.gtech.com-20131106-053812.twr Open Source Tripwire(R) 2.4.1 Integrity Check Report Report generated by: root Report created on: Wed 06 Nov 2013 05:38:12 AM EST Database last updated on: Wed 06 Nov 2013 05:31:17 AM EST =============================================================================== Report Summary: =============================================================================== Host name: xxsi1242.gtk.gtech.com Host IP address: 156.24.65.171 Host ID: None Policy file used: /etc/tripwire/tw.pol Configuration file used: /etc/tripwire/tw.cfg Database file used: /var/lib/tripwire/xxsi1242.gtk.gtech.com.twd Command line used: tripwire --check =============================================================================== Rule Summary: =============================================================================== ------------------------------------------------------------------------------- Section: Unix File System ------------------------------------------------------------------------------- Rule Name Severity Level Added Removed Modified --------- -------------- ----- ------- -------- Invariant Directories 66 0 0 0 Temporary directories 33 0 0 0 * Tripwire Data Files 100 0 0 1 Tech Stack 100 0 0 0 User binaries 66 0 0 0 Tripwire Binaries 100 0 0 0 * CLPS bins 100 0 0 2 CLPS Configuration files 100 0 0 0 ESCommon 100 0 0 0 Shell Binaries 100 0 0 0 OS executables and libraries 100 0 0 0 Security Control 100 0 0 0 ESCommon Configuration 100 0 0 0 (/etc/gtech/escommon) Total objects scanned: 12358 Total violations found: 3 =============================================================================== Object Summary: =============================================================================== ------------------------------------------------------------------------------- # Section: Unix File System ------------------------------------------------------------------------------- ------------------------------------------------------------------------------- Rule Name: Tripwire Data Files (/etc/tripwire/tw.pol) Severity Level: 100 ------------------------------------------------------------------------------- Modified: "/etc/tripwire/tw.pol" ------------------------------------------------------------------------------- Rule Name: CLPS bins (/opt/jboss/server) Severity Level: 100 ------------------------------------------------------------------------------- Modified: "/opt/jboss/server/esapps1/data/hypersonic/localDB.lck" "/opt/jboss/server/gis/data/hypersonic/localDB.lck" =============================================================================== Error Report: =============================================================================== No Errors ------------------------------------------------------------------------------- *** End of report *** Note: In the output I only am getting the files which are modified. I need the detail output for this. But unfortunately I am not getting what I expected. Please help me to proced further.

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• Google Chrome warning that Javascript is disabled

  - by kirchoffs415

  I hope somebody can help. I keep getting the following message when I log on: Your Javascript is disabled. Limited functionality is available. It will stay for maybe a day sometimes two. I have uninstalled javascript and reinstalled but still the same. I am using chrome. Any help would be grateful many thanks Dominic My system spec is as follows System InformationOS Name Microsoft® Windows Vista™ Home Premium Version 6.0.6002 Service Pack 2 Build 6002 Other OS Description Not Available OS Manufacturer Microsoft Corporation System Name DOM-PC System Manufacturer Dell Inc. System Model Inspiron 1545 System Type X86-based PC Processor Pentium(R) Dual-Core CPU T4200 @ 2.00GHz, 2000 Mhz, 2 Core(s), 2 Logical Processor(s) BIOS Version/Date Dell Inc. A05, 25/02/2009 SMBIOS Version 2.4 Windows Directory C:\Windows System Directory C:\Windows\system32 Boot Device \Device\HarddiskVolume3 Locale United Kingdom Hardware Abstraction Layer Version = "6.0.6002.18005" User Name DOM-PC\DOM Time Zone GMT Standard Time Installed Physical Memory (RAM) 3.00 GB Total Physical Memory 2.96 GB Available Physical Memory 1.38 GB Total Virtual Memory 5.89 GB Available Virtual Memory 4.25 GB Page File Space 3.00 GB Page File C:\pagefile.sys My System Specs

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• Lost Permission on Files using wrong chmod syntax Centos 5.5

  - by alloutfallout

  Hello, I was trying to remove write permissions on an entire directory, and I used the incorrect command: chmod 644 -r sites/default I meant to type chmod -R 644 sites/default The result was this: chmod: cannot access `644': No such file or directory $ ls -als sites total 24 4 drwxr-xr-x 5 user group 4096 Jan 11 10:54 . 4 drwxrwxr-x 14 user group 4096 Jan 11 10:11 .. 4 drwxr-xr-x 4 user group 4096 Jan 5 01:25 all 4 d-w------- 3 user group 4096 Jan 11 10:43 default 4 -rw-r--r-- 1 user group 1849 Apr 15 2010 example.sites.php I fixed the permissions on the default folder with $ chmod 644 sites/default But, the following ls shows a all the files with red backgrounds and question marks. I can't access any files unless I am root. $ ls -als sites/default total 0 ? ?--------- ? ? ? ? ? . ? ?--------- ? ? ? ? ? .. ? ?--------- ? ? ? ? ? default.settings.php ? ?--------- ? ? ? ? ? files ? ?--------- ? ? ? ? ? settings.php When I log in as root, I can edit all of the files, and their permissions appear correctly. I do not know how to undo the damage caused by using -r with chmod instead of -R. Any Suggestions?

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• Do you really need cable management for a cabinet with just switches and patch panels?

  - by ObligatoryMoniker

  We are about to start wiring out a building expansion and our vendor has laid out the racks in the following configuration: Option 1 1U Fiber patch panel 2U Cable Manager 2U 48 port Patch Panel 2U Cable Manager 2U 48 port Patch Panel 2U Cable Manager 1U 48 port Switch 2U Cable Manager 1U 48 port Switch Total = 15U All the patch panels would be connected to the switches with 1ft+ cables fed through cable management. What I am considering instead is: Option 2 1U Fiber patch panel 1U 24 port Patch Panel 1U 48 port Switch 2U 48 port Patch Panel 1U 48 port Switch 2U 48 port Patch Panel Total = 8U All of the patch panels would be connected to the switches with .5 ft cables directly on their face with the top 24 ports of each switch patched to the patch panel above it and the bottom 24 ports of each switch patched to the patch panel beneath it which would not require any cable management. If I go with option 2 it save all of the space used by cable management and allows us to keep adding on switches and patch panels at the end without having to re-cable all of the patch panels above. Our vendor has indicated that this is not best practice and that .5ft cables will introduce cross talk. I could understand that being the case if we were connecting the .5 ft cable directly into another switch but we are connecting it to a patch panel that likely has another 150 ft cable run from the back of the patch panel out to the port in the building in which case the real resulting cable is 150.5 ft at minimum before even connecting it to a PC. It seems like it makes much more sense to go with option 2. It is easier to expand, saves space, and saves money on cabling and cable management. Does this kind of configuration make sense or is there a legitimate reason to choose Option 1 over Option 2?

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• JVM disappeared on Mac OS X Snow Leopard 10.6.8

  - by weisjohn

  I'm working in Eclipse one night, (also using Android's DDMS from the commandline). The next morning, I open the lid... attempt to run Eclipse and get an error. me$ sudo /Applications/eclipse/eclipse JavaVM: requested Java version ((null)) not available. Using Java at "" instead. JavaVM: Failed to load JVM: /bundle/Libraries/libserver.dylib So I then attempt to find out where my JDKs are pointed: me$ ls -la /System/Library/Frameworks/JavaVM.framework/Versions/ total 64 drwxr-xr-x 12 root wheel 408 Nov 16 10:44 . drwxr-xr-x 12 root wheel 408 Sep 7 09:39 .. lrwxr-xr-x 1 root wheel 5 Sep 7 17:07 1.3 -> 1.3.1 drwxr-xr-x 3 root wheel 102 Dec 2 2009 1.3.1 lrwxr-xr-x 1 root wheel 10 Sep 7 17:07 1.4 -> CurrentJDK lrwxr-xr-x 1 root wheel 10 Sep 7 17:07 1.4.2 -> CurrentJDK lrwxr-xr-x 1 root wheel 10 Sep 7 17:07 1.5 -> CurrentJDK lrwxr-xr-x 1 root wheel 10 Sep 7 17:07 1.5.0 -> CurrentJDK lrwxr-xr-x 1 root wheel 10 Sep 7 17:07 1.6 -> CurrentJDK drwxr-xr-x 9 root wheel 306 Nov 16 10:44 A lrwxr-xr-x 1 root wheel 1 Sep 7 17:07 Current -> A lrwxr-xr-x 1 root wheel 59 Sep 7 17:07 CurrentJDK -> /System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents Everything looks normal so far... me$ ls -la /System/Library/Java/JavaVirtualMachines/ total 0 drwxr-xr-x 2 root wheel 68 Nov 16 10:44 . drwxr-xr-x 5 root wheel 170 Nov 16 10:44 .. Apparently, my virtual machines have been deleted or moved? I'll probably be able to just re-install Java, but does anyone have any insight into why this may have happened or how to prevent in the future?

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• How to allow writing to a mounted NFS partition

  - by Cerin

  How do you allow a specific user permission to write to an NFS partition? I've mounted an NFS share on my localhost (a Fedora install), and I can read and write as root, but I'm unable to write as the apache user, even though all the files and directories in the share on my localhost and remote host are owned by apache. For example, I've mounted it via this line in my /etc/fstab: remotehost:/data/media /data/media nfs _netdev,soft,intr,rw,bg 0 0 And both locations are owned by apache: [root@remotehost ~]# ls -la /data total 24 drwxr-xr-x. 6 root root 4096 Jan 6 2011 . dr-xr-xr-x. 28 root root 4096 Oct 31 2011 .. drwxr-xr-x 4 apache apache 4096 Jan 14 2011 media [root@localhost ~]# ls -la /data total 16 drwxr-xr-x 4 apache apache 4096 Dec 7 2011 . dr-xr-xr-x. 27 root root 4096 Jun 11 15:51 .. drwxrwxrwx 5 apache apache 4096 Jan 31 2011 media However, when I try and write as the apache user, I get a "Permission denied" error. [root@localhost ~]# sudo -u apache touch /data/media/test.txt' touch: cannot touch `/data/media/test.txt': Permission denied But of course it works fine as root. What am I doing wrong?

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• If I partition a drive connected via eSata will it show different partitions when connected via USB?

  - by jeffreypriebe

  I have an odd problem with an external drive. I'm formatting it connected to my laptop prior to connecting it to my router. The HDD enclosure has both an eSata and USB connections. Generally, I connect it via eSata to my laptop. I created my partitions and connected it to the router, but I see partition information that is different than what I created. After chasing leads concerning large HDD size, I mindlessly connected the HDD to my laptop with USB. Lo! I see the same partitions as the router. Attached are screenshots using the same program and the HDD in question. The only difference is the connection. For the first, I connected via eSata and hit "refresh" on the partition program. Then, turned off the HDD, disconnected the eSata cable, and connected via USB. Power and refresh. eSata: reports a total HDD size of 2328 GB, with four partitions (the third being 1.96TB) USB: reports a total HDD size of 280 GB, with three partitions (the third being 279 GB) Any idea why this is happening? It looks like it clearly is an issue of the 4K sector size and not playing nice with the USB enclosure. I tried it eSata and USB in Windows and Linux and it appears consistently that eSata is reporting correctly, USB incorrectly.

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• Slow performance of MySQL database on one server and fast on another one, with similar configurations

  - by Alon_A

  We have a web application that run on two servers of GoDaddy. We experince slow preformance on our production server, although it has stronger hardware then the testing one, and it is dedicated. I'll start with the configurations. Testing: CentOS Linux 5.8, Linux 2.6.18-028stab101.1 on i686 Intel(R) Xeon(R) CPU L5609 @ 1.87GHz, 8 cores 60 GB total, 6.03 GB used Apache/2.2.3 (CentOS) MySQL 5.5.21-log PHP Version 5.3.15 Production: CentOS Linux 6.2, Linux 2.6.18-028stab101.1 on x86_64 Intel(R) Xeon(R) CPU L5410 @ 2.33GHz, 8 cores 120 GB total, 2.12 GB used Apache/2.2.15 (CentOS) MySQL 5.5.27-log - MySQL Community Server (GPL) by Remi PHP Version 5.3.15 We are running the same code on both servers. The Problem We have some function that executes ~30000 PDO-exec commands. On our testing server it takes about 1.5-2 minutes to complete and our production server it can take more then 15 minutes to complete. As you can see here, from qcachegrind: Researching the problem, we've checked the live graphs on phpMyAdmin and discovered that the MySQL server on our testing server was preforming at steady level of 1000 execution statements per 2 seconds, while the slow production MySQL server was only 250 executions statements per 2 seconds and not steady at all, jumping from 0 to 250 every seconds. You can clearly see it in the graphs: Testing server: Production server: You can see here the comparison between both of the configuration of the MySQL servers.Left is the fast testing and right is the slow production. The differences are highlighted, but I cant find anything that can cause such a behavior difference, as the configs are mostly the same. Maybe you can see something that I cant see. Note that our tables are all InnoDB, so the MyISAM difference is (probably) not relevant. Maybe it is the MySQL Community Server (GPL) that is installed on the production server that can cause the slow performance? Or maybe it needs to be configured differently for 64bit ? I'm currently out of ideas...

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• Cannot load from raid with grub

  - by Andrew Answer

  I have a RAID1 array on my Ubuntu 12.04 LTS and my /sda HDD has been replaced several days ago. I use this commands to replace: # go to superuser sudo bash # see RAID state mdadm -Q -D /dev/md0 # State should be "clean, degraded" # remove broken disk from RAID mdadm /dev/md0 --fail /dev/sda1 mdadm /dev/md0 --remove /dev/sda1 # see partitions fdisk -l # shutdown computer shutdown now # physically replace old disk by new # start system again # see partitions fdisk -l # copy partitions from sdb to sda sfdisk -d /dev/sdb | sfdisk /dev/sda # recreate id for sda sfdisk --change-id /dev/sda 1 fd # add sda1 to RAID mdadm /dev/md0 --add /dev/sda1 # see RAID state mdadm -Q -D /dev/md0 # State should be "clean, degraded, recovering" # to see status you can use cat /proc/mdstat After bebuilding completion "fdisk -l" says what I have not valid partition table /dev/md0. So 1) "update-grub" find only /sda and /sdb Linux, not /md0 2) "dpkg-reconfigure grub-pc" says "GRUB failed to install the following devices /dev/md0" I cannot load my system except from /sdb1 and /sda1, but in DEGRADED mode... This is my partial fdisk -l output: Disk /dev/sdb: 500.1 GB, 500107862016 bytes 255 heads, 63 sectors/track, 60801 cylinders, total 976773168 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x000667ca Device Boot Start End Blocks Id System /dev/sdb1 * 63 940910984 470455461 fd Linux raid autodetect /dev/sdb2 940910985 976768064 17928540 5 Extended /dev/sdb5 940911048 976768064 17928508+ 82 Linux swap / Solaris Disk /dev/md0: 481.7 GB, 481746288640 bytes 2 heads, 4 sectors/track, 117613840 cylinders, total 940910720 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Disk /dev/md0 doesn't contain a valid partition table Anybody can resolve this issue? I have big headache with this.

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• lvm mirroring space unavailable.

  - by Bryan Ward

  I am trying to migrate my data on lvm to two new disks, and setup mirroring between the two. I have successfully migrated all of the data to the first of the two disks, leaving the second one completely available as a mirror. I verified this using pvdisplay -m /dev/sd{g,h}1 --- Physical volume --- PV Name /dev/sdg1 VG Name vg PV Size 931.51 GiB / not usable 3.19 MiB Allocatable yes PE Size 4.00 MiB Total PE 238466 Free PE 82866 Allocated PE 155600 PV UUID v2nc3j-EFBR-QpuG-xgro-Rm59-fmu6-IB3QcR --- Physical Segments --- Physical extent 0 to 49999: Logical volume /dev/vg/videos Logical extents 0 to 49999 Physical extent 50000 to 99999: Logical volume /dev/vg/home Logical extents 0 to 49999 Physical extent 100000 to 129999: Logical volume /dev/vg/music Logical extents 0 to 29999 Physical extent 130000 to 155599: Logical volume /dev/vg/videos Logical extents 50000 to 75599 Physical extent 155600 to 238465: FREE --- Physical volume --- PV Name /dev/sdh1 VG Name vg PV Size 931.51 GiB / not usable 3.19 MiB Allocatable yes PE Size 4.00 MiB Total PE 238466 Free PE 238466 Allocated PE 0 PV UUID LuTrem-WcsZ-qw7l-2CDS-lLKI-wdq0-QEXhLf --- Physical Segments --- Physical extent 0 to 238465: FREE Then when I try to mirror the home logical volume for example, it says that I do not have sufficient space. I used lvconvert -m1 vg/home and the output was: Insufficient suitable allocatable extents for logical volume : 50000 more required Unable to allocate extents for mirror(s). This puzzling to me because it appears as if there is plenty of space on the second disk to mirror. Is there something I have done wrong here? Or is there a way to explicitly tell LVM where to put each leg of the mirror? I'm using lvm2.

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• Ruby net:LDAP returns "code = 53 message = Unwilling to perform" error

  - by Yong

  Hi, I am getting this error "code = 53, message = Unwilling to perform" while I am traversing the eDirectory treebase = "ou=Users,o=MTC". My ruby script can read about 126 entries from eDirectory and then it stops and prints out this error. I do not have any clue of why this is happening. I am using the ruby net:LDAP library version 0.0.4. The following is an excerpt of the code. require 'rubygems' require 'net/ldap' ldap = Net::LDAP.new :host => "10.121.121.112", :port => 389, :auth => {:method => :simple, :username => "cn=abc,ou=Users,o=MTC", :password => "123" } filter = Net::LDAP::Filter.eq( "mail", "*mtc.ca.gov" ) treebase = "ou=Users,o=MTC" attrs = ["mail", "uid", "cn", "ou", "fullname"] i = 0 ldap.search( :base => treebase, :attributes => attrs, :filter => filter ) do |entry| puts "DN: #{entry.dn}" i += 1 entry.each do |attribute, values| puts " #{attribute}:" values.each do |value| puts " --->#{value}" end end end puts "Total #{i} entries found." p ldap.get_operation_result Here is the output and the error at the end. Thank you very much for your help. DN: cn=uvogle,ou=Users,o=MTC mail: --->[email protected] fullname: --->Ursula Vogler ou: --->Legislation and Public Affairs dn: --->cn=uvogle,ou=Users,o=MTC cn: --->uvogle Total 126 entries found. OpenStruct code=53, message="Unwilling to perform"

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• Oracle Database Recovery Problem

  - by Palani

  I am very new to Oracle, and trying to restore a oracle 8i database on win 2000 server. I have one week old database backup (backup taken with exp command), and i want to restore it now. Now I am unable to login through sqlplus (got shutdown in progress error) I have a backup and i want to restore it, but oracle is not starting at all, and 'imp' command is failing. I started sqlplus / as sysdba and following is the log of what i am trying to do. Can some one guide me further. SQL> shutdown immediate; ORA-01109: database not open Database dismounted. ORACLE instance shut down. SQL> startup; ORACLE instance started. Total System Global Area 143423516 bytes Fixed Size 75804 bytes Variable Size 58105856 bytes Database Buffers 85164032 bytes Redo Buffers 77824 bytes Database mounted. ORA-01589: must use RESETLOGS or NORESETLOGS option for database open SQL> shutdown immediate; ORA-01109: database not open Database dismounted. ORACLE instance shut down. SQL> startup mount; ORACLE instance started. Total System Global Area 143423516 bytes Fixed Size 75804 bytes Variable Size 58105856 bytes Database Buffers 85164032 bytes Redo Buffers 77824 bytes Database mounted. SQL> alter database open; alter database open * ERROR at line 1: ORA-01589: must use RESETLOGS or NORESETLOGS option for database open SQL> alter database open resetlogs; alter database open resetlogs * ERROR at line 1: ORA-01245: offline file 1 will be lost if RESETLOGS is done ORA-01110: data file 1: 'C:\ORACLE\ORADATA\ABCD\SYSTEM01.DBF'

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• rsnapshot - not correctly archiving mysql databases

  - by Tiffany Walker

  My rsnapshot configuration: snapshot_root /.snapshots/ backup /home/user localhost/ backup_script /usr/local/backup_mysql.sh localhost/mysql/ Using this file: NOW=$(date +"%m-%d-%Y") # mm-dd-yyyy format FILE="" # used in a loop ### Server Setup ### #* MySQL login user name *# MUSER="root" #* MySQL login PASSWORD name *# MPASS="YOUR-PASSWORD" #* MySQL login HOST name *# MHOST="127.0.0.1" #* MySQL binaries *# MYSQL="$(which mysql)" MYSQLDUMP="$(which mysqldump)" GZIP="$(which gzip)" # get all database listing DBS="$($MYSQL -u $MUSER -h $MHOST -p$MPASS -Bse 'show databases')" # start to dump database one by one for db in $DBS do FILE=$BAK/mysql-$db.$NOW-$(date +"%T").gz # gzip compression for each backup file $MYSQLDUMP --single-transaction -u $MUSER -h $MHOST -p$MPASS $db | $GZIP -9 > $FILE done It dumps the databases under / I then tried with the following: http://bash.cyberciti.biz/backup/rsnapshot-remote-mysql-backup-shell-script/ I got: rsnapshot hourly ---------------------------------------------------------------------------- rsnapshot encountered an error! The program was invoked with these options: /usr/bin/rsnapshot hourly ---------------------------------------------------------------------------- ERROR: backup_script /usr/local/backup_mysql.sh returned 1 WARNING: Rolling back "localhost/mysql/" ls -la /.snapshots/hourly.0/localhost/mysql total 8 drwxr-xr-x 2 root root 4096 Nov 23 17:43 ./ drwxr-xr-x 4 root root 4096 Nov 23 18:20 ../ What exactly am I doing wrong? EDIT: # /usr/local/backup_mysql.sh *** Dumping MySQL Database *** Database> information_schema..cphulkd..eximstats..horde..leechprotect..logaholicDB_ns1..modsec..mysql..performance_schema..roundcube..test.. *** Backup done [ files wrote to /.snapshots/tmp/mysql] *** root@ns1 [~]# ls -la /.snapshots/tmp/mysql total 8040 drwxr-xr-x 2 root root 4096 Nov 23 18:41 ./ drwxr-xr-x 3 root root 4096 Nov 23 18:41 ../ -rw-r--r-- 1 root root 1409 Nov 23 18:41 cphulkd.18_41_45pm.gz -rw-r--r-- 1 root root 113522 Nov 23 18:41 eximstats.18_41_45pm.gz -rw-r--r-- 1 root root 4583 Nov 23 18:41 horde.18_41_45pm.gz -rw-r--r-- 1 root root 71757 Nov 23 18:41 information_schema.18_41_45pm.gz -rw-r--r-- 1 root root 692 Nov 23 18:41 leechprotect.18_41_45pm.gz -rw-r--r-- 1 root root 2603 Nov 23 18:41 logaholicDB_ns1.18_41_45pm.gz -rw-r--r-- 1 root root 745 Nov 23 18:41 modsec.18_41_45pm.gz -rw-r--r-- 1 root root 138928 Nov 23 18:41 mysql.18_41_45pm.gz -rw-r--r-- 1 root root 1831 Nov 23 18:41 performance_schema.18_41_45pm.gz -rw-r--r-- 1 root root 3610 Nov 23 18:41 roundcube.18_41_45pm.gz -rw-r--r-- 1 root root 436 Nov 23 18:41 test.18_41_47pm.gz MySQL Backup seems fine.

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• Cannot write samba shares

  - by Batsu

  Running samba 3.5 on Red Hat Enterprise 6.1 I'm having issues sharing two folders. Here is the output of testparm: [global] workgroup = DOMAINNAME server string = Samba Server Version %v interfaces = lo, eth1 bind interfaces only = Yes map to guest = Bad User log file = /var/log/samba/log.%m max log size = 50 idmap uid = 16777216-33554431 idmap gid = 16777216-33554431 hosts allow = 10.50.183.48, 10.50.184.41, 10.50.184.199, 10.50.183.160, 127.0.0.1 hosts deny = 0.0.0.0/0 cups options = raw [test] comment = test folder path = /usr/local/samba valid users = claudio write list = claudio force user = claudio read only = No create mask = 0775 directory mask = 0775 [test2] comment = another test path = /home/claudio/tst valid users = claudio write list = claudio force user = claudio read only = No create mask = 0775 From the Windows XP machine I'm connecting from I'm able to read test but not write, while for test2 I can't even access the folder (though I can see it listed). ls -l /usr/local ... drwxrwxrwx. 2 claudio claudio 4096 Dec 3 10:39 samba ... ls -l /user/local/samba total 32 -rwxrwxrwx. 1 claudio claudio 9 Nov 29 16:26 asd.txt -rwxrwxrwx. 1 claudio claudio 728 Dec 3 10:16 out.txt ... ls -l /home/claudio/ ... drwxrwxr-x. 2 claudio claudio 4096 Dec 3 09:57 tst ... ls -l /home/claudio/tst total 4 -rw-rw-r--. 1 claudio claudio 4 Dec 3 09:57 asd.txt Any suggestion?

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• IPtables - Accept Arbitrary Packets

  - by Asad Moeen

  I've achieved a lot on blocking attacks on GameServers but I'm stuck on something. I've blocked major requests of game-server which it aceepts in the form "\xff\xff\xff\xff" which can be followed by the actual queries like get status or get info to make something like "\xff\xff\xff\xff getstatus " but I see other queries if sent to the game-server will cause it to reply with a "disconnect" packet with the same rate as input so if the input rate is high then the high output of "disconnect" might give lag to the server. Hence I want to block all queries except the ones actual clients use which I suppose are in the form "\xff\xff\xff\xff" or .... so, I tried using this rule : -A INPUT -p udp -m udp -m u32 ! --u32 0x1c=0xffffffff -j ACCEPT -A INPUT -p udp -m udp -m recent --set --name Total --rsource -A INPUT -p udp -m udp -m recent --update --seconds 1 --hitcount 20 --name Total --rsource -j DROP Now where the rule does accept the clients but it only blocks requests in the form "\xff\xff\xff\xff getstatus " ( by which GameServer replies with status ) and not just "getstatus " ( by which GameServer replies with disconnect packet ). So I suppose the accept rule is accepting the simple "string" as well. I actually want it to also block the non-(\xff) queries. So how do I modify the rule?

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• AVConv increases song duration when converting MP3

  - by chauffch

  I am struggling with the following issue. I want to convert an MP3 ADTS into pure a MP3. I am using AVConv on Ubuntu 12.10. The outcome is a file that has the same size, but the duration is now longer. $ ls -l total 6436 -rw-r--r-- 1 teuf teuf 6586514 nov. 25 09:25 Blindsided_Bon_Iver.mpga $ file Blindsided_Bon_Iver.mpga Blindsided_Bon_Iver.mpga: MPEG ADTS, layer III, v1, 160 kbps, 44.1 kHz, JntStereo $ avconv -i Blindsided_Bon_Iver.mpga -c copy Blindsided_Bon_Iver.mp3 avconv version 0.8.4-4:0.8.4-0ubuntu0.12.04.1, Copyright (c) 2000-2012 the Libav developers built on Nov 6 2012 16:50:25 with gcc 4.6.3 [mp3 @ 0x8c6e240] max_analyze_duration reached Input #0, mp3, from 'Blindsided_Bon_Iver.mpga': Duration: 00:05:29.29, start: 0.000000, bitrate: 160 kb/s Stream #0.0: Audio: mp3, 44100 Hz, stereo, s16, 160 kb/s Output #0, mp3, to 'Blindsided_Bon_Iver.mp3': Metadata: TSSE : Lavf53.21.0 Stream #0.0: Audio: libmp3lame, 44100 Hz, stereo, 160 kb/s Stream mapping: Stream #0:0 -> #0:0 (copy) Press ctrl-c to stop encoding size= 6432kB time=329.30 bitrate= 160.0kbits/s video:0kB audio:6432kB global headers:0kB muxing overhead 0.002080% $ ls -l total 12868 -rw-rw-r-- 1 teuf teuf 6586129 nov. 27 22:26 Blindsided_Bon_Iver.mp3 -rw-r--r-- 1 teuf teuf 6586514 nov. 25 09:25 Blindsided_Bon_Iver.mpga $ file Blindsided_Bon_Iver.mp3 Blindsided_Bon_Iver.mp3: Audio file with ID3 version 2.4.0, contains: MPEG ADTS, layer III, v1, 32 kbps, 44.1 kHz, Stereo Amarok shows the new file has a duration of 25:27 and has a lot of silence. Am I using an incorrect option? Is it a bug in AVConv? Any ideas how to fix it?

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• memory tuning with rails/unicorn running on ubuntu

  - by user970193

  I am running unicorn on Ubuntu 11, Rails 3.0, and Ruby 1.8.7. It is an 8 core ec2 box, and I am running 15 workers. CPU never seems to get pinned, and I seem to be handling requests pretty nicely. My question concerns memory usage, and what concerns I should have with what I am seeing. (if any) Here is the scenario: Under constant load (about 15 reqs/sec coming in from nginx), over the course of an hour, each server in the 3 server cluster loses about 100MB / hour. This is a linear slope for about 6 hours, then it appears to level out, but still maybe appear to lose about 10MB/hour. If I drop my page caches using the linux command echo 1 /proc/sys/vm/drop_caches, the available free memory shoots back up to what it was when I started the unicorns, and the memory loss pattern begins again over the hours. Before: total used free shared buffers cached Mem: 7130244 5005376 2124868 0 113628 422856 -/+ buffers/cache: 4468892 2661352 Swap: 33554428 0 33554428 After: total used free shared buffers cached Mem: 7130244 4467144 2663100 0 228 11172 -/+ buffers/cache: 4455744 2674500 Swap: 33554428 0 33554428 My Ruby code does use memoizations and I'm assuming Ruby/Rails/Unicorn is keeping its own caches... what I'm wondering is should I be worried about this behaviour? FWIW, my Unicorn config: worker_processes 15 listen "#{CAPISTRANO_ROOT}/shared/pids/unicorn_socket", :backlog = 1024 listen 8080, :tcp_nopush = true timeout 180 pid "#{CAPISTRANO_ROOT}/shared/pids/unicorn.pid" GC.respond_to?(:copy_on_write_friendly=) and GC.copy_on_write_friendly = true before_fork do |server, worker| STDERR.puts "XXXXXXXXXXXXXXXXXXX BEFORE FORK" print_gemfile_location defined?(ActiveRecord::Base) and ActiveRecord::Base.connection.disconnect! defined?(Resque) and Resque.redis.client.disconnect old_pid = "#{CAPISTRANO_ROOT}/shared/pids/unicorn.pid.oldbin" if File.exists?(old_pid) && server.pid != old_pid begin Process.kill("QUIT", File.read(old_pid).to_i) rescue Errno::ENOENT, Errno::ESRCH # already killed end end File.open("#{CAPISTRANO_ROOT}/shared/pids/unicorn.pid.ok", "w"){|f| f.print($$.to_s)} end after_fork do |server, worker| defined?(ActiveRecord::Base) and ActiveRecord::Base.establish_connection defined?(Resque) and Resque.redis.client.connect end Is there a need to experiment enforcing more stringent garbage collection using OobGC (http://unicorn.bogomips.org/Unicorn/OobGC.html)? Or is this just normal behaviour, and when/as the system needs more memory, it will empty the caches by itself, without me manually running that cache command? Basically, is this normal, expected behaviour? tia

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