search for: osss

Dear r-helpers, Can anyone suggest why lm() doesn't complain here: summary(osss.lm1 <- lm(logOdds ~ c.setSize %in% task, data = osss)) whereas in package:nlme (and in package:lme4) osss.lmL <- lmList(logOdds ~ c.setSize %in% task | subj, data = osss) # Error in `contrasts<-`(`*tmp*`, value = "contr.treatment") : # contrasts can be applied only to factors w...

We are seeing some disturbing (probably due to our ignorance) behavior from lustre 1.6.3 right now. We have 8 OSSs with 3 OSTs per OSS (24 physical LUNs). We just created a brand new lustre file system across this configuration using the default mkfs.lustre formatting options. We have this file system mounted across 400 clients. At the moment, we have 63 IOzone threads running on roughly 60 diff...

lustre-1.8 has OSD structures in place, what do I need to add in to make it work with OSD T10 standard? could anybody point me to some docs mentioning lustre internals - OSTs, OSSs, OBDs, and control flow when a read/write call is invoked by a client. thanks. -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.lustre.org/pipermail/lustre-discuss/attachments/20071129/1a68ad82/attachment-0002.html

...m with new servers/storage and upgrade to all the lustre servers to 1.8.4 as well at the same time. We would like to make use of the ldiskfs-ext4 on the new servers to use larger OSTs. I just want to confirm the following facts: 1. Is is possible to run different versions of ldiskfs on different OSSs of the same lustre file system. 2. Can I install the Lustre RPMs meant for the ext4 system on our older servers that were formatted with the older ldiskfs and expect it to work? Do I have to do any ext3-ext4 conversion or equivalent to make this work? TIA Nirmal

Hello Lustre Experts I am trying to solve a problem with very slow "ls" and other big amount of file operations but good overall read/write rates. We are running a small cluster of 3 OSSs with 9 OSTs, 1MDS (with SSD MDT) and currently two clients. All server nodes are centos 5.2 with lustre 1.8.1 while the clients are centos 5.4 with lustre 1.8.3. All components are networked with DDR IB. Striping is set to 1 or 2 for different folders. From the very beginning of our tests we had r...

...om Oleg we got the right patches applied and NFS working well. Maximum performance was about 60 MB/sec. Last week that dropped to about 12.5 MB/sec and I cannot find a reason. Lustre clients all obtain 100+ MB/sec on GigE. Each OST is good for 270 MB/sec. When mounting the client on one of the OSSs I get 230 MB/sec. Seems the speed is there. How can NFS and Lustre be tuned better? Current config for 1.6.4.3 is below: 1. MGS/OSS w/ 4 OSTs - mgs_max_num_threads=32, ost_max_num_threads=64 2. OSS w/ 6 OSTs - ost_max_num_threads=64 3. 20 Lustre clients - all perform well (GREAT Lustre devel...

...UID INACTIVE 5: lustre-OST0005_UUID ACTIVE 6: lustre-OST0006_UUID ACTIVE All OSTs show as completely fine on the other clients, and the system is working there. In addition, I have run numerous checks of the IB network (ibhosts, ibping, etc.), and I do not see any networking issues. Moreover, the OSSs include: OSS #1 --> OST #0, #1, #2 OSS #2 --> OST #3, #4, #5 OSS #3 --> OST #6 So, the machine is seeing two of three OSTs on OSS #1 and one of three OSTs on OSS #2. It is showing some OSTs on an OSS as active and others as inactive. So this does not seem to be a...

Hi, We''re setting up fairly large Lustre 2.1.2 filesystems, each with 18 nodes and 159 resources all in one Corosync/Pacemaker cluster as suggested by our vendor. We''re getting mixed messages on how large of a Corosync/Pacemaker cluster will work well between our vendor an others. 1. Are there Lustre Corosync/Pacemaker clusters out there of this size or larger? 2.

Hi all, I''m getting my feet wet in the infiniband lake and of course I run into some problems. It would seem I got the compilation part of sles11 kernel 2.6.27 + Lustre 1.8.3 + ofed 1.4.2 right, because it allows me to see and use the infiniband fabric, and because ko2iblnd loads without any complaints. In /etc/modprobe.d/lustre (this is a Debian system, hence this subdir of

Hi all, We are organising another open source search social evening (OSSSE?) in London on Tuesday the 12th of January. The plan is to get together and chat about search technology, from Lucene to Solr, Hadoop, Mahout, Xapian, Ferret and the like - bringing together people from across the field to discuss ideas and ask questions over a quiet drink. We've also creat...

Hello Folks, Are there client/server version combinations that would lead to read-only file systems on the client? We have 2.1.6.0 servers with 1.8.9 clients and it seems every 1.8.9 client just flips mounts to read-only (with no actual message until a write is attempted) yet when the OSSs (at 2.1.6.0) mount, they can write all day long. On write, the 1.8.9 clients log: LustreError: 25284:0:(mdc_locks.c:672:mdc_enqueue()) ldlm_cli_enqueue error: -30 Any ideas? ---------------- John White HPC Systems Engineer (510) 486-7307 One Cyclotron Rd, MS: 50C-3209C Lawrence Berkeley Nati...

Dear, New Xenoppix is released. http://unit.aist.go.jp/itri/knoppix/xen/index-en.html It has new fueature (Xenoppix-terminal-server and install2win). It bases on KNOPPIX 4.0.2 DVD or CD. (The size of Xenoppix is sitll over 700MB, please burn a DVD-ROM.) New feature (Experimental) *Act as a terminal server. Xenoppix can be a Terminal Server and boots clinet PC with PXE network

Chris, Perhaps you need to perform some write_conf like command. I''m not sure if this is needed in 1.6 or not. Shane ----- Original Message ----- From: lustre-discuss-bounces at lists.lustre.org <lustre-discuss-bounces at lists.lustre.org> To: lustre-discuss <lustre-discuss at lists.lustre.org> Sent: Fri Mar 07 12:03:17 2008 Subject: Re: [Lustre-discuss] Multihomed

Hi, thanks for previous help. I have some question about Lustre RPC and the sequence of events that occur during large concurrent write() involving many processes and large data size per process. I understand there is a mechanism of flow control by credits, but I''m a little unclear on how it works in general after reading the "networking & io protocol" white paper. Is

This morning I''ve had both my infiniband and tcp lustre clients hiccup. They are evicted from the server presumably as a result of their high load and consequent timeouts. My question is- why don''t the clients re-connect. The infiniband and tcp clients both give the following message when I type "df" - Cannot send after transport endpoint shutdown (-108). I''ve