From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Mike Young" Subject: RE: ACL Support Date: Thu, 1 Apr 2004 14:11:54 -0800 Message-ID: <200404012212.OAA21330@amber.he.net> References: <406C8E2F.2070304@suse.com> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Return-path: list-help: list-unsubscribe: list-post: Errors-To: flx@namesys.com In-Reply-To: <406C8E2F.2070304@suse.com> List-Id: Content-Type: text/plain; charset="us-ascii" To: 'Jeff Mahoney' Cc: reiserfs-list@namesys.com I should be able to get around the 2TB limit using LBD support on the 2.4 kernel. Other than that, the 16TB limit shouldn't be a problem either since I can't get beyond that with the current VFS limit of 32-bit inodes on Xeon platforms. With that, I can only go 2^32*4k block size, which is 16TB. Hmmm. Reiserfs is looking pretty good for me. Thanks, Mike -----Original Message----- From: Jeff Mahoney [mailto:jeffm@suse.com] Sent: Thursday, April 01, 2004 1:49 PM To: Mike Young Cc: reiserfs-list@namesys.com Subject: Re: ACL Support -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Mike Young wrote: | Wow Jeff! That's a great explanation and very helpful too. Can you answer | a couple more questions for me on the v3.x reiserfs? I'm trying to | understand the limits right now. For example, how big of a volume can I | support? How large of a file? And how many files? | | I actually have a problem in that I've got files that are 2TB in size-- | nothing bigger, though. Mike - The on-disk format for ReiserFS v3 defines the maximum filesystem size as 2^32 * blocksize, which is currently limited by the size of a page on the system. So, 16 TB assuming a 4k blocksize. The maximum file size is 2^61-1bytes, but is obviously limited by the maximum size of the filesystem. The maximum number of files is 2^32. If you're using a 2.4 kernel, you're not going to be able to handle that workload using any filesystem, since block devices are limited to 2^32 * 512 bytes = 2 TB. This, in turn, limits all filesystems to 2 TB in size. Using the 2.6 kernel, the block device limits have been raised, so ReiserFS can use its maximum capacity. - -Jeff - -- Jeff Mahoney SuSE Labs jeffm@suse.com -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.2 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org iD8DBQFAbI4vLPWxlyuTD7IRAsaSAJwIN8Vv/W+LVO5xA2muNWhAsuusAACfV2sn eX23G/LcEyflt0svSywvIUM= =Bi+O -----END PGP SIGNATURE-----