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RE: [Linux-cluster] gfs2 doc and performance question




The man page you point out is for gfs1. The man page for mkfs.gfs2 doesn't have the "-b" option for blocksize. That goes to my point about documentation.

-Mahmoud

Mahmoud Hanafi
Sr. System Administrator
CSC HPC COE
Bld. 676
2435 Fifth Street
WPAFB, Ohio 45433
(937) 255-1536



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"Alexandre Racine" <Alexandre Racine mhicc org>
Sent by: linux-cluster-bounces redhat com

08/15/2007 12:31 PM

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RE: [Linux-cluster] gfs2 doc and performance question





I don't know the answer to all your questions, but the blocksize is the first option in the man page of gfs_mkfs

# man gfs_mkfs

DESCRIPTION
      gfs_mkfs 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  archi-
             tectures  (i386, x86_64, s390, s390x), the memory page size is 4096 bytes.  On other architec-
             tures it may be bigger.  The default block size is 4096 bytes.  In  general,  GFS  filesystems
             should not deviate from the default value.
[...]



Alexandre Racine
Projets spéciaux
514-461-1300 poste 3304
alexandre racine mhicc org



-----Original Message-----
From: linux-cluster-bounces redhat com on behalf of Mahmoud Hanafi
Sent: Tue 2007-08-14 22:54
To: linux clustering
Subject: [Linux-cluster] gfs2 doc and performance question

I been trying to find documentation on gfs2. but it seem that there isn't
much.

Is there any detail documentation on gfs2?
Can one set the block size when creating gfs2 filesystem?
Has there been any performance benchmark of gfs2?


Thanks,
Mahmoud Hanafi
Sr. System Administrator
CSC HPC COE
Bld. 676
2435 Fifth Street
WPAFB, Ohio 45433
(937) 255-1536



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bind CSC to any order or other contract unless pursuant to explicit
written agreement or government initiative expressly permitting the use of
e-mail for such purpose.
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