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 -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- This is a PRIVATE message. If you are not the intended recipient, please delete without copying and kindly advise us by e-mail of the mistake in delivery. NOTE: Regardless of content, this e-mail shall not operate to 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. -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- <table width=100%> <tr valign=top> <td width=40%>"Alexandre Racine" <Alexandre.Racine@mhicc.org> Sent by: linux-cluster-bounces@redhat.com 08/15/2007 12:31 PM <table border> <tr valign=top> <td bgcolor=white> <div align=center>Please respond to linux clustering <linux-cluster@redhat.com></div></table> <td width=59%> <table width=100%> <tr valign=top> <td> <div align=right>To</div> <td>"linux clustering" <linux-cluster@redhat.com> <tr valign=top> <td> <div align=right>cc</div> <td> <tr valign=top> <td> <div align=right>Subject</div> <td>RE: [Linux-cluster] gfs2 doc and performance question</table> <table> <tr valign=top> <td> <td></table> </table> <tt>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 -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- This is a PRIVATE message. If you are not the intended recipient, please delete without copying and kindly advise us by e-mail of the mistake in delivery. NOTE: Regardless of content, this e-mail shall not operate to 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. -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- -- Linux-cluster mailing list Linux-cluster@redhat.com https://www.redhat.com/mailman/listinfo/linux-cluster</tt>