Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
Hello we have two clusters whith 2 nodes each One whith SLES10SP2 ( kernel 2.6.16.60-0.34-xen + drbd 8.3.1) One Whith SLES11 (kernel 2.6.27.19-5-xen + drbd 8.3.1). No problem whith performance on both Your test is not accurate, if you copy file, it is suppose there is a FS on drbd devices... Could you give the speed directly on block device and after on the drbd device. Have you test whith the latest version of drbd? Cordialement, Antony MARTINEAU Service informatique Technicien Informatique LIPPI Management La Fouillouse 16440 Mouthiers sur Boeme Tel.: 0545673435 Fax: 0545673435 Courriel: antony.martineau at lippi.fr http://www.lippi.fr De : Lise Didillon <ldidillon at prologue.fr> A: drbd-user at lists.linbit.com Date: 06/04/2009 18:38 Objet : [DRBD-user] drbd (8.0.14, 8.0.16) very slow with kernels 2.6.27 to 2.6.29 but ok with kernel 2.6.20 Envoyé par : drbd-user-bounces at lists.linbit.com Hello, with drbd-8.0.14 or 8.0.16 on the same machines: My tests are "copy big files on the replicated device". This takes for a file 8 seconds. instead of 0.2 seconds without drbd if kernel version is 2.6.27 or 28 or 29. but with kernel 2.6.20 there is no performance problem: it takes sensibly the same time to copy this file if drbd is running or not. I alway use the same drbd.conf for these tests. have you some ideas about why drbd is so slow with kernels 2.6.27 to 2.6.29? regards, Lise Didillon -- Lise DIDILLON Ingénieur d'études, Ligne Produit UseIT lise.didillon at prologue.fr ZA de Courtaboeuf 12 Avenue des Tropiques BP 73 - 91 943 Les Ulis Cedex Tél : +33 1 69 29 39 39 Fax : +33 1 69 29 90 43 _______________________________________________ drbd-user mailing list drbd-user at lists.linbit.com http://lists.linbit.com/mailman/listinfo/drbd-user Ce message et toutes les pieces jointes sont etablis a l'attention exclusive de ses destinataires et sont strictement confidentiels. Pour en savoir plus cliquer ici This message and any attachments are confidential to the ordinary user of the e-mail address to which it was addressed and may also be privileged. More information -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.linbit.com/pipermail/drbd-user/attachments/20090407/e9a4a86f/attachment.htm> -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: image/gif Size: 5552 bytes Desc: not available URL: <http://lists.linbit.com/pipermail/drbd-user/attachments/20090407/e9a4a86f/attachment.gif> -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: image/gif Size: 2473 bytes Desc: not available URL: <http://lists.linbit.com/pipermail/drbd-user/attachments/20090407/e9a4a86f/attachment-0001.gif>