On 2011-05-20, at 10:17 AM, "Sam Bigger" wrote: > I doubt it. The largest lustre systems are a little over 300 million files > that are really in existence. > > However, the limits, in terms of just maximum inodes allowed, using 4K per > inode and a 2TB max MDT size (mirrored 2 copies), only allows for a little > over 500 million files max.
The theoretical limit is actually 4B inodes for ext3/4. I don't think anyone has ever tested that. In Lustre 2.1 the default inode ratio has been changed to 1 inode per 2048 bytes (formerly 1 per 4096 bytes). That would allow 4B inodes on an 8TB MDT. This can be used for any version of mkfs.lustre with "--mkfsoptions '-i 2048'". You probably also want to use the ext4 ldiskfs and add '-t ext4' to mkfsoptions so that it enables flex_bg to speed up mkfs and fsck time. > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of Daniel > Mayfield > Sent: Friday, May 20, 2011 9:53 AM > To: [email protected] > Subject: [Lustre-discuss] Huge numbers of inodes > > Does anybody have experience with Lustre filesystems in the 5-10B inode > range? What kind of gotchas do you find at that scale? What are your > stripe settings like? > > daniel > > --------------------------------------------------------------- > This email, along with any attachments, is confidential. If you > believe you received this message in error, please contact the > sender immediately and delete all copies of the message. > Thank you. > > _______________________________________________ > Lustre-discuss mailing list > [email protected] > http://lists.lustre.org/mailman/listinfo/lustre-discuss > > _______________________________________________ > Lustre-discuss mailing list > [email protected] > http://lists.lustre.org/mailman/listinfo/lustre-discuss _______________________________________________ Lustre-discuss mailing list [email protected] http://lists.lustre.org/mailman/listinfo/lustre-discuss
