Thanks, Jim! You are right. OrangeFS can be configured in high-availability mode, allowing one server to fail over to another, but this functionality is provided by hardware. In this case, you still have the same number of servers running, whether the server is a primary or secondary. Thus, the filesystem sees *ALL* of the servers originally configured.
Becky On Thu, May 17, 2012 at 1:25 PM, Jim Kusznir <[email protected]> wrote: > This sounds more like a drbd + nfs or similar solution. Two > "stand-alone" file servers that are running the block-level > duplication between the servers (essentially a RAID-1). If you're > truely serious, you'd throw in some of the linux virtual server stuff > that watches each other and takes over the IP of a failed server. > Thus, with a stateless protocol like NFS, it could in theory work. > > That said, I have never actually done this, and I do not know what > kinds of guarantees one could extract against data loss when a server > fails, etc. > > I've not heard of such a solution (other than some expensive > hardware-based fileserver companies such as NetApp and the like). > > On Thu, May 17, 2012 at 9:00 AM, Becky Ligon <[email protected]> wrote: > > I am personally not aware of other parallel filesystems that perform as > you > > want, but maybe others on this list do. > > > > Becky > > > > > > On Thu, May 17, 2012 at 9:20 AM, Thurein Aung <[email protected]> > > 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 > >>> > >>> > > > > > > > > -- > > 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 > > > > _______________________________________________ > 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
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