similar to: Follow up on async I/O question

Sort of a followup... We've been running OCFS in sync mode for a little over a month now, and it has worked reasonably well. Performance is still a bit spotty, but we're told that the next kernel update for RHEL3 should improve the situation. We might eventually move to Polyserve's cluster filesystem for its multipathing capability and potentially better performance, but at least we

Greetings, Does anyone know if it is possible to give a guest domain access to character device hardware such as a SCSI tape drive (/dev/st0 | /dev/nst0)? I have recompiled the guest xenU kernel with hardware access and declared the pci SCSI card in the config file directive as follows: pci = [ ''4,3,0'' ] The log file when started reports: [2005-11-01 17:24:57 xend] DEBUG

Hi experts, My customer issued debugocfs to check for file_size and extent info but values such as file_size, alloc_size, next_free_ext were 0. (/dev/sdi1 contains datafiles and arc files) # debugocfs -a 0 /dev/sdi1 debugocfs 1.0.10-PROD1 Fri Mar 5 14:35:29 PST 2004 (build fcb0206676afe0fcac47a99c90de0e7b) file_extent_0: file_number = 128 disk_offset = 1433600 curr_master = 0 file_lock =

having a problem with ocfs. device /dev/sdd mounted on 2 nodes, node 0 and node 1 tried to create file /u01/oracle/prod/proddata/temp01.dbf from node 1 (ALTER TABLESPACE TEMP ADD TEMPFILE...) caused oracle server process to hang in a "D" state apparently trying to create the file. the file has not been created yet. If I type "ls" from node 2 in directory /u01/oracle/prod

Is the following statement still valid for either OCFS 1.0.9-12 or OCFS 1.0.11-1? The following is from one of the questions put forward by Derek Suzuki on Ocfs-users "A couple more minor questions about OCFS and RHEL3" > Next, I saw a Metalink thread which suggests that async I/O is not > supported on OCFS with RHAS 2.1. It doesn't say anything about RHEL3. > We've

an ocfs-volume was nearly full (only 800MB free). i deleted some datafiles to free space: $ df -h . Filesystem Size Used Avail Use% Mounted on /dev/sdp1 10G 5.3G 4.8G 53% /db/DPS so there are more than 4GB available. $ sqlplus /nolog SQL*Plus: Release 9.2.0.4.0 - Production on Wed Sep 1 12:57:48 2004 Copyright (c) 1982, 2002, Oracle Corporation. All rights

Running database in ASYNC mode in RHEL 3 has a potential risk of redo logs failure due to some short io's. A note from http://oss.oracle.com/projects/ocfs/dist/files/RedHat/RHEL3/i386/README.txt says that the above mentioned problem is fixed in OCFS 1.0.9-12 "RELEASE 1.0.9-12 Fixes a potential corruption with large, aligned, direct I/Os, for example Oracle redo logs or direct path SQL

A few weeks back we opened a TAR with Oracle support to determine whether an OCFS (1.0.9-12) + async configuration was considered supportable. At first a technician said yes, but I followed up with Wim's explanation of how that combination is potentially troublesome and inadequately tested. The technician double-checked, then confirmed that OCFS + async is considered risky. He did say that a

Oh yeah - easy way to check, Randy: Next time your node hangs, get on the OTHER NODE and go into each directory where files are being opened (datafiles, archivelogs, controlefiles, redo logs, etc) and delete a file (you can create one first then delete it). If this causes the hung node to recover then you're having the same problem I was having. Jeremy >>> "Jeremy

Hi, First of all great project You are developing, really usefull,but.... Compiling the OCFS System under a clean RedHat 8 Installaton renders an error during compilation: make -C format make[2]: Entering directory `/root/ocfs-1.0.8/tools/format' gcc -g -O2 -pipe -I../../ocfs2/Common/inc -Iinc -I../../tools/debugocfs -I../../ocfs2/Linux/inc -DLINUX -DUSERSPACE_TOOL -o format.o -c

My understanding is that if I "zfs set checksum=<different>" to change the algorithm that this will change the checksum algorithm for all FUTURE data blocks written, but does not in any way change the checksum for previously written data blocks. I need to corroborate this understanding. Could someone please point me to a document that states this? I have searched and searched

Wim, I opened a TAR on this issue, and was informed that async+ocfs is supported (as opposed to "works") as of 1.0.9-12. If this is not the case, then it sounds like there may be a miscommunication on the Oracle side. > -----Original Message----- > From: Wim Coekaerts [mailto:wim.coekaerts@oracle.com] > Sent: Saturday, March 06, 2004 10:36 PM > To: Derek Suzuki > Cc:

I am still having this weird problem with nodes hanging while I'm running OCFS. I'm using OCFS 1.0.9-12 and RHAS 2.1 I've been working on tracking it down and here's what I've got so far: 1. I create a file from node 0. This succeeds; I can /bin/cat the file, append, edit, or whatever. 2. From node 1, I do an operation that accesses the DirNode (e.g. /bin/ls) 3. Node 0

I am still having this weird problem with nodes hanging while I'm running OCFS. I'm using OCFS 1.0.9-12 and RHAS 2.1 I've been working on tracking it down and here's what I've got so far: 1. I create a file from node 0. This succeeds; I can /bin/cat the file, append, edit, or whatever. 2. From node 1, I do an operation that accesses the DirNode (e.g. /bin/ls) 3. Node 0

I'm vainly trying to get a new server ready to become the default mail server. We have a SAN, so I don't need to move the mailboxes (I can mount the same partition from both machines), but the question is what version of dovecot to load. I'm assuming that I cannot run both 0.99.14 and 1.00.x on the same maildirs (the indexes differ?). However, is it safe for me to mount the

Andreas Dilger wrote: > On Feb 20, 2009 20:23 +0300, Kirill Kuvaldin wrote: >> I'm evaluating different cluster file systems that can work with large >> clustered environment, e.g. hundreds of nodes connected to a SAN over >> FC. >> >> So far I looked at OCFS2 and GFS2, they both worked nearly the same >> in terms of performance, but since I ran my

We are using RHEL ES 3.0 Update 6, kernel version is 2.4.21-37.ELsmp. We have 5-node Oracle 10g RAC (10.1.0.4). # cat /proc/ocfs/version 1.0.14-PROD1 Fri Jan 7 13:58:41 PST 2005 (build 7a10bc19875bb2abf8a7fd110639b81b) One problem with ocfs v1 here is that when I used "debugocfs -h /dev/emcpowere1" command, it always show that "curr_master=INVALID_MASTER". My question is: Is

Here's a basic overview of the bug and a workaround for any DBA's or SysAdmin's reading this list. I'm sure that there will be an official fix soon, this is just an FYI if you run into the problem I had in the meantime. As soon as you install the updated ocfs-*.rpm the problem will go away. (You won't even need to fsck or anything... aren't they such nice guys?)

For the 2nd problem, on node 5, I tried the following: $ rmdir hotbackup rmdir: `hotbackup': Directory not empty $ ls -ldi hotbackup/ 266133504 drwxr-xr-x 1 oracle dba 131072 Dec 14 15:46 hotbackup/ Now this folder is back! Strange! > -----Original Message----- > From: Wu, Hai > Sent: Wednesday, December 14, 2005 5:47 PM > To: 'ocfs-users@oss.oracle.com'

Greetings, Having read about the previous OSFS hangs, I think this one that we are seeing is different, but I'm not sure if this is caused by OCFS or the Linux OS. We are running OCFS Version 1.09 with Linux AS 3.0/9i RAC. We have a 2 node Intel Cluster (Node 1 and Node 2). This morning the DBA tried to do an "ls" command on /u06/oradata/database