we are getting filesystem locking issue very frequently. we are using linux rhel 5.5. our filesystem type is gfs2 where we are facing locking issue and unix admin team reboots server to over come with this issue. suddenly we used to face slowness on server and server gets hung. after that unix team says that filesystem is facing locking issue and this needs to be restart.
Any idea why filesystem is getting locked and how to check why it is getting locked and due to which id it has been locked.
Do you know how I can find detailed
information on filesystems on Linux and
Solaris. And I mean not only for the OS but and how it(the OS) uses the hard drives!
Thank you in advance!!
Solid Snake;) ;) (3 Replies)
Hi all,
Suppose i have a disk having three partitions (hda1,hda2,hda3) ,and are mounted all under /dev/ ..
My question is where the / will be existing.which file system it wil be in?
I am windows user new to linux/unix.Any help in learning internals would be appreciated .
Thanks ,... (1 Reply)
Hi,
Please have a look this: http://tldp.org/LDP/Linux-Filesystem-Hierarchy/Linux-Filesystem-Hierarchy.pdf
I think this can be very useful for a beginner/intermediate level user to understand the filesystem hierarchy and as well as it can be used as a reference to various linux commands and... (0 Replies)
Hi everyone,
I have got a requirement that, i need to check a specific folder,say /test/lock/ for few specific files, say *lock*, whether it has been locked or not.If any one of it is locked than i need to delete that file after a specific time, say after 10 minutes.
I never have worked on... (4 Replies)
I've been running Django on MySQL on a Linux server for about 3 months w/o any problem. Suddenly a couple days ago, the server Django began throwing errors about not being able to connect to MySQL, at which point the entire server seizes up. The Apache Web server stops serving pages and SSH seizes... (3 Replies)
Hi,
Sometimes when I want to unmount some filesystem I get "The requested resource is busy." error.
In such a case I try to find and kill process that uses that filesystem. I do that on random.
Is there a right way to find whitch prosesses use filesystem resource at given time ?
thanks... (1 Reply)
Hi,
In my application,I need to monitor the devices connected through serial port in solaris sparc 9 OS.I used c and java code for it and I am able to do the same but the problem comes when I restart the system and the open my application and try to monitor it.but I m unable to monitor the... (2 Replies)
Hi all,
Can anyone help ...on how to ensure that a file is locked .
thanks & regards,
Soodoo
----------------------------------------
Problem description: -
We usually use the mv command in scripts to make sure that a file is complete and not being written to by another process.
... (1 Reply)
Hi Guys i cant find any anwers everywhere hope you can help me, we have an issue with our Tru64 V5.1 2650 alpha server, its saying that a FS is full but its not, free space is very low but if you check its fs and its usage, free fs should be high:
$ df -i
Filesystem 512-blocks ... (12 Replies)
Hi,
Need help with following case. I am trying to shring filesystem size and reduce few luns from volume group. Situation looks like that :
#
lsvg -l data1vg
data1vg:
LV NAME TYPE LPs PPs PVs LV STATE MOUNT POINT
data1 jfs2 3200 3200 ... (5 Replies)
Discussion started by: borek
5 Replies
LEARN ABOUT CENTOS
fsck.gfs2
fsck.gfs2(8) System Manager's Manual fsck.gfs2(8)NAME
fsck.gfs2 - Offline GFS and GFS2 file system checker
SYNOPSIS
fsck.gfs2 [OPTION]... DEVICE
WARNING
All computers must have the filesystem unmounted before running fsck.gfs2. Failure to unmount from all nodes in a cluster will likely
result in filesystem corruption.
DESCRIPTION
fsck.gfs2 will check that the GFS or GFS2 file system on a device is structurally valid. It should not be run on a mounted file system.
If file system corruption is detected, it will attempt to repair the file system. There is a limit to what fsck.gfs2 can do. If important
file system structures are destroyed, such that the checker cannot determine what the repairs should be, reparations could fail.
GFS2 is a journaled file system, and as such should be able to repair damage to the file system on its own. However, faulty hardware has
the ability to write incomplete blocks to a file system thereby causing corruption that GFS2 cannot fix. The first step to ensuring a
healthy file system is the selection of reliable hardware (i.e. storage systems that will write complete blocks - even in the event of
power failure).
Note: Most file system checkers will not check the file system if it is "clean" (i.e. unmounted since the last use). The fsck.gfs program
behaves differently because the storage may be shared among several nodes in a cluster, and therefore problems may have been introduced on
a different computer. Therefore, fsck.gfs2 will always check the file system unless the -p (preen) option is used, in which case it fol-
lows special rules (see below).
OPTIONS -a Same as the -p (preen) option.
-f Force checking even if the file system seems clean.
-h Help.
This prints out the proper command line usage syntax.
-q Quiet.
-n No to all questions.
By specifying this option, fsck.gfs2 will only show the changes that would be made, but not make any changes to the filesystem.
-p Preen (same as -a: automatically repair the file system if it is dirty, and safe to do so, otherwise exit.)
Note: If the file system has locking protocol lock_nolock, the file system is considered a non-shared storage device and the fsck is
deemed safe. However, fsck.gfs2 does not know whether it was called automatically from the init process, due to options in the
/etc/fstab file. Therefore, if the locking protocol is lock_dlm and -a or -p was specified, fsck.gfs2 cannot determine whether the
disk is mounted by other nodes in the cluster. Therefore, the fsck is deemed to be unsafe and a warning is given if any damage or
dirty journals are found. In that case, the file system should be unmounted from all nodes in the cluster and fsck.gfs2 should be
run manually without the -a or -p options.
-V Version.
Print out the program version information.
-v Verbose operation.
Print more information while running.
-y Yes to all questions.
By specifying this option, fsck.gfs2 will not prompt before making changes.
fsck.gfs2(8)