I run a stability test, using OCFSv2 in the lab for document storage (not so many directories, but still many thousands of files, on 2 servers) and had devastating results - system crashed 2 times (I mean - whole cluster) in 2 weeks, first time it damaged system disk on one of the servers (making it useles until I reinstalled it), second it just freeze on one server and sticked on another, and it had a damaged (bad link counter) in 1 directory in the very end.
Adding dumb _self fencing_ schema (which cause system to suicide regularry), very bad setting for heartbeat (you can not specify few interfaces, as youc an in any professional cluster system), and bad tuning capabilities (you can work out 12 second timeout on heartbeat, but you can not do anything with a few other timeouts), I treat OCFSv2 as _ready for experimental usage only_, and gave up (not a surprise - I expected something like this). The only good point was - it never lost data and it never damaged user's data. -:) PS. If you run it - make 3-d node, even if you don't use it in application. It (at least) solve 'second node suicide' problem. PS. System was SP3 update, i386, kernel 257. I plan to make the same experiment on better servers with x86_64. I have OCFSv2 using for Oracle backups (in the lab) without any problems for 2 month. ----- Original Message ----- From: "Robinson Maureira Castillo" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Monday, July 10, 2006 6:19 AM Subject: [Ocfs2-users] Using OCFS2 for heavy I/O Hi all, I have to evaluate OCFS2 for a mail cluster, and reviewing at the docs, it says that it can't hold more than 32000 subdirectories, this is a per-level limit? And what about files? This application uses directory hashing for user storage, so eventually, we'll end up with millions of directories and millions of files, usually small (< 16KB), but I guess we never get over this limit in a directory level, at least not for directories. Currently we're splitting the FS in 1TB vdisks, our storage system is HP EVA 8000. Can OCFS2 be used in this scenario? Or when is planned to kill that subdirectory limit? TIA and best regards, __________________________ Robinson Maureira Castillo Soluciones Integrales S.A. Eleodoro Flores 2425, Ñuñoa, Santiago - Chile Central: (56 2) 411 9000 Fax: (56 2) 411 9001 Directo: (56 2) 411 9047 Móvil: 9 599 4987 e-mail: [EMAIL PROTECTED] _______________________________________________ Ocfs2-users mailing list [email protected] http://oss.oracle.com/mailman/listinfo/ocfs2-users _______________________________________________ Ocfs2-users mailing list [email protected] http://oss.oracle.com/mailman/listinfo/ocfs2-users
