Hello ,
Common atomic operation on filesystem is mv .
Code : "while [ -f $LOCK2 ] " will fail , eventually , some day under heavy stress with concurrent access .
Correct locking should be like this :
This code will work on almost any possible combinations ( NFS , AFS , GFS , OCFS etc )
Last edited by Franklin52; 01-04-2010 at 07:17 AM..
Reason: Please use code tags!
Hi,
Does anyone seen this error before..
kernel: ENOMEM in journal_alloc_journal_head, retrying.
I encounter this problem on IBM eServers where when the above error appears usually the machine is dead or hanged. Unless a hard reboot is been done. Is this something have to do with the memory... (1 Reply)
hi #!/bin/bash
SERVER=10.89.40.35
USER=xyz
PASSWD=xyz
ftp -in $SERVER<<EOF
user $USER $PASSWD
mkdir PPL
cd /path of remote dir
lcd /path of local dir
hash
bin
put <file name>
bye
<<EOF
The above ftp script i have to schedule in crontab at a particular instance of time run daily.... (2 Replies)
I am using the following code in a C Shell script to transfer files to a remote server:
ftp -n logxx.xxxx.xxx.xxx.com <<DO_FTP1
quote user $user_name
quote pass $password
ascii
put $js_file_name
bin
put $FinalZipFile
quit
DO_FTP1
This code works great except on those rare occasions... (8 Replies)
ok, so I'm trying to add a function to my local script that runs a command on a remote host. The reason why this is needed is that, there are other scripts that run different commands on the same remote host.
so the problem is that many times there are multiple scripts being run on the remote... (1 Reply)
hi, everyone.
My want to execute the shell script below per 10 seconds
PID=`pgrep java`
if
then
/home/java/java
fi
crontab wouldn't help me.
some one can give me suggestions?thanks
---------- Post updated at 07:29 AM ---------- Previous update was at 07:26 AM ----------
... (6 Replies)
Hi ,
When i hit the URL using WGET command ,it is retrying according to the number of retry we mentioned along with Wget command.
my expectation :
1) If 1st try is failed and iam retrying again before 2nd retry i have to check for "xxxxxxx" entry in the log file.
2) If "XXXXXXX" entry is... (4 Replies)
Hi,
I am new to this forum, could any one please help me to understand the LOCKFILE command with an example and what exactly it is used for and how it is used.
Thanks
Reshu289 (4 Replies)
I need to read a file line by line, then depending on the contents of each line, type in a code that will get written to an array.
The problem I have is when I ask the user to confirm the input code, if it is wrong, how do i Return to ask again?
Any thing I try increments the file to the next... (6 Replies)
Hi,
I have a process which can run one instance at a time. Currently we have multiple scripts trying to kickoff this process. I wanted to implement the semaphore mechanism to achieve this.
I was going through few examples. The below code seems to be reasonable solution.
... (5 Replies)
We encountered these error 2 times(e.g. Solaris 10 with NetWorker installed) with in the month of August, but we couldn't pin point the root cause, it might be bad sector, bad cable or software incompatibility?
Do you experience these issue or please share your understanding about this? Thanks... (0 Replies)
Discussion started by: B@S
0 Replies
LEARN ABOUT DEBIAN
mkfs.gfs
mkfs.gfs(8) System Manager's Manual mkfs.gfs(8)NAME
mkfs.gfs - Make a GFS filesystem
SYNOPSIS
mkfs.gfs [OPTION]... DEVICE
DESCRIPTION
mkfs.gfs is used to create a Global File System.
OPTIONS -b BlockSize
Set the filesystem block size to BlockSize (must be a power of two). The minimum block size is 512. The FS block size cannot
exceed the machine's memory page size. On the most architectures (i386, x86_64, s390, s390x), the memory page size is 4096 bytes.
On other architectures it may be bigger. The default block size is 4096 bytes. In general, GFS filesystems should not deviate from
the default value.
-D Enable debugging output.
-h Print out a help message describing available options, then exit.
-J MegaBytes
The size of the journals in Megabytes. The default journal size is 128 megabytes. The minimum size is 32 megabytes.
-j Number
The number of journals for mkfs.gfs to create. You need at least one journal per machine that will mount the filesystem.
-O This option prevents mkfs.gfs from asking for confirmation before writing the filesystem.
-p LockProtoName
LockProtoName is the name of the locking protocol to use. The locking protocol should be lock_dlm for a clustered file system or
if you are using GFS as a local filesystem (1 node only), you can specify the lock_nolock protocol.
-q Be quiet. Don't print anything.
-r MegaBytes
mkfs.gfs will try to make Resource Groups (RGs) about this big. Minimum RG size is 32 MB. Maximum RG size is 2048 MB. A large RG
size may increase performance on very large file systems. If not specified, mkfs.gfs will choose the RG size based on the size of
the file system: average size file systems will have 256 MB RGs, and bigger file systems will have bigger RGs for better perfor-
mance.
-s Blocks
Journal segment size in filesystem blocks. This value must be at least two and not large enough to produce a segment size greater
than 4MB.
-t LockTableName
The lock table field appropriate to the lock module you're using. It is clustername:fsname. Clustername must match that in clus-
ter.conf; only members of this cluster are permitted to use this file system. Fsname is a unique file system name used to distin-
guish this GFS file system from others created (1 to 16 characters). Lock_nolock doesn't use this field.
-V Print program version information, then exit.
EXAMPLE
mkfs.gfs -t mycluster:mygfs -p lock_dlm -j 2 /dev/vg0/mygfs
This will make a Global File System on the block device "/dev/vg0/mygfs". It will belong to "mycluster" and register itself as
wanting locking for "mygfs". It will use DLM for locking and make two journals.
mkfs.gfs(8)