From mboxrd@z Thu Jan 1 00:00:00 1970 From: Gerrit Hannaert Subject: Re: reiserfs for cluster Date: Tue, 06 May 2003 23:01:22 +0200 Message-ID: <3EB822A2.3090005@web.de> References: <5.2.0.9.0.20030506160902.03b1da60@pop.puretec.de> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Return-path: list-help: list-unsubscribe: list-post: Errors-To: flx@namesys.com In-Reply-To: <5.2.0.9.0.20030506160902.03b1da60@pop.puretec.de> List-Id: Content-Type: text/plain; charset="us-ascii" To: reiserfs-list@namesys.com Cc: Juergen Waiblinger I've tried something like this on a SAN a while ago, using ext3, but perhaps the results would not be so different using reiserfs. The situation we were looking at involved flat-file database updates which would occur only once every day or even less than that. Obviously the major issue is who has write-access; but things seem to work if: - one machine does the writes, after which the other machines will need to re-mount the filesystem (probably works best if writes affect new files, and are not appends/modifications...). Otherwise new files will not show up because this data is cached (I expect someone else can give some better low-level explanation and possible workarounds)... - filesystem on read-only machines is mounted with journaling disabled, and the noatime,ro options (updating access times are writes, too). Otherwise the filesystem will not be in a consistent state, and will be checked every time you mount it. There may be other alternatives, but this is a simple solution if your 'write demands' are not too high. I haven't done much performance or scalability tests so I don't know if this method is preferrable over NFS and such (but it's so much cooler!). Cheers, - Gerrit Juergen Waiblinger wrote: > Hello, > > we are running different beowulf clusters and the storage amount > increases all the time. Until now we have been using Veritas > Clusterfilesystem, but for different reasons we want to go for an > other solution. As we are using reiserfs quite happily on the desktops > we thought about using this for the storagesubsystem attached to the > masterserver of the cluster. > there will only be sun and linux machines accessing the files but > there will be concurrent file access. > Has anybody tried this or could give some other solutions > Any information will be appreciated > > TIA will summarize to the list >