Hi everybody i have some questions on lustre and i need ur help in solving them: 1. for a certain OST, can we divide it between clients with access rights? 2. can a very large file span multiple OSTs? 3. can a certain partition be accessed by multiple clients? thanks in advance Yours Heba ____________________________________________________________________________________ Finding fabulous fares is fun. Let Yahoo! FareChase search your favorite travel sites to find flight and hotel bargains. http://farechase.yahoo.com/promo-generic-14795097
On Mar 12, 2007 00:37 -0700, Heba Farouk wrote:> 1. for a certain OST, can we divide it between clients with access rights?Do you mean limiting usage of the space to some clients and not others, then no. If you mean "can multiple clients use space on the same OST" then the answer is yes.> 2. can a very large file span multiple OSTs?Yes, definitely. You can have single files of nearly 320TB if you have 160 or more OSTs of >= 2TB in size and 64-bit clients (there is a 16TB limit on 32-bit clients).> 3. can a certain partition be accessed by multiple clients?Clients never access a disk partition directly, so this question doesn''t make sense. See also #1 above. Cheers, Andreas -- Andreas Dilger Principal Software Engineer Cluster File Systems, Inc.
thanks for ur reply now i tried to add a big file (about 12 GB) on one of the clients, i use 2 OSTs each of size 10 GB, but unfortunately, when i copied the big file to the client , it gave me cp: writing `/mnt/testfs/est_othersplitaa'': No space left on device and it copied only 8,325116 GB any help thanks in advance --- Andreas Dilger <adilger@clusterfs.com> wrote:> On Mar 13, 2007 00:47 -0700, Heba Farouk wrote: > > --- Andreas Dilger <adilger@clusterfs.com> wrote: > > > On Mar 12, 2007 00:37 -0700, Heba Farouk wrote: > > > > 1. for a certain OST, can we divide it > between > > > clients with access rights? > > > > > > Do you mean limiting usage of the space to some > > > clients and not others, > > > then no. If you mean "can multiple clients use > > > space on the same OST" > > > then the answer is yes. > > > > but may i divide the space to areas, i.e. if i > have a > > space of 4 OSTs, may i divide it to 3 areas > > No, there is currently no way to partition > individual OSTs. If you > want to do that you would need to have multiple > Lustre filesystems. > You can export multiple OST targets from the same > OSS, and there is > no problem if these OSTs are used by different > filesystems, so long > as they are only ever used by one filesystem. > > Cheers, Andreas > -- > Andreas Dilger > Principal Software Engineer > Cluster File Systems, Inc. > >Yours Heba ____________________________________________________________________________________ Never miss an email again! Yahoo! Toolbar alerts you the instant new Mail arrives. http://tools.search.yahoo.com/toolbar/features/mail/
show lfs getstripe est_othersplitaa and two ost disk usage maybe you set the stripecount=1 2007/3/15, Heba Farouk <heba.farouk@yahoo.com>:> > > thanks for ur reply > > now i tried to add a big file (about 12 GB) on one of > the clients, i use 2 OSTs each of size 10 GB, but > unfortunately, when i copied the big file to the > client , it gave me > cp: writing `/mnt/testfs/est_othersplitaa'': No space > left on device > and it copied only 8,325116 GB > > any help > > thanks in advance > > > --- Andreas Dilger <adilger@clusterfs.com> wrote: > > > On Mar 13, 2007 00:47 -0700, Heba Farouk wrote: > > > --- Andreas Dilger <adilger@clusterfs.com> wrote: > > > > On Mar 12, 2007 00:37 -0700, Heba Farouk wrote: > > > > > 1. for a certain OST, can we divide it > > between > > > > clients with access rights? > > > > > > > > Do you mean limiting usage of the space to some > > > > clients and not others, > > > > then no. If you mean "can multiple clients use > > > > space on the same OST" > > > > then the answer is yes. > > > > > > but may i divide the space to areas, i.e. if i > > have a > > > space of 4 OSTs, may i divide it to 3 areas > > > > No, there is currently no way to partition > > individual OSTs. If you > > want to do that you would need to have multiple > > Lustre filesystems. > > You can export multiple OST targets from the same > > OSS, and there is > > no problem if these OSTs are used by different > > filesystems, so long > > as they are only ever used by one filesystem. > > > > Cheers, Andreas > > -- > > Andreas Dilger > > Principal Software Engineer > > Cluster File Systems, Inc. > > > > > > > Yours > > Heba > > > > > > ____________________________________________________________________________________ > Never miss an email again! > Yahoo! Toolbar alerts you the instant new Mail arrives. > http://tools.search.yahoo.com/toolbar/features/mail/ > > _______________________________________________ > Lustre-discuss mailing list > Lustre-discuss@clusterfs.com > https://mail.clusterfs.com/mailman/listinfo/lustre-discuss > >-- miFor BladeAnti.org -------------- next part -------------- An HTML attachment was scrubbed... URL: http://mail.clusterfs.com/pipermail/lustre-discuss/attachments/20070315/1d913f26/attachment.html