If you are talking about shared-nothing storage, GPFS can do this if you turn on both data and metadata replication and set the failure groups accordingly. Of course, replication means paying the price in terms of performance and space.
If you have shared storage, GPFS does this out-of-the box and as mentioned earlier, PVFS can be setup using linux-ha (now pacemaker?) which will handle migrating the IP, mount point and pvfs server to the working server. Then you tune your timeout/retry settings in PVFS to make sure the PVFS client will wait long enough for the fail over to complete. It's a bit of a pain to setup but does work. kevin On May 17, 2012, at 8:20 AM, Thurein Aung wrote: > Hi Sir, > Really thanks for your prompt reply. Do u have any idea of which filesystem > is capable of it? > What I want is - > When both servers are online, I/O must be parallel. When one node dies, > filesystem must be still acccessible with or without human interaction. > > If it is out of your interest, you may ignore my question. > > Regards, > > On May 17, 2012 9:13 PM, "Becky Ligon" <[email protected]> wrote: > Thurein: > > In the current release of OrangeFS, you cannot remove a server from your > filesystem without an outage. To completely remove a server, the data in > your filesystem will have to be copied out, the filesystem reinitialized with > the new config file, and then copied in. To replace a server, the data and > metadata stored on that server can be manually copied over to another server. > Reinitialization is not needed in this case. If the new server retains the > hostname of the old server, then the config file won't have to change. > > The OrangeFS team is developing a methodology that will allow you to remove a > server while the filesystem is running. It is high on our priority list. > > Hope this helps, > Becky Ligon > > On Thu, May 17, 2012 at 4:24 AM, Thurein Aung <[email protected]> wrote: > Hi All, > I am quite new to this PVFS things. Please kindly pardon me with any mistake. > I have 2 x pvfs servers running. Is it possible to remove 1 of pvfs server > properly? If yes, how? > > Thanks in advance. > Thurein Aung > System Integration Engineer > Cxrus Solutions Pte Ltd > 211 Henderson Road > #09-01 Singapore 159552 > > > _______________________________________________ > Pvfs2-users mailing list > [email protected] > http://www.beowulf-underground.org/mailman/listinfo/pvfs2-users > > > > > -- > Becky Ligon > OrangeFS Support and Development > Omnibond Systems > Anderson, South Carolina > > > _______________________________________________ > Pvfs2-users mailing list > [email protected] > http://www.beowulf-underground.org/mailman/listinfo/pvfs2-users
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