Daniel, Since ext3 is advertised as "ext2 with a journal," I would say that the journal is the only additional overhead you'll see in terms of disk space usage. According to the Boeblingen lab folks, ext3 was the best compromise between performance and least CPU-consuming journaling file system they tested, compared to JFS or Reiserfs. There appeared to be a nasty interaction between Reiserfs and VM time slicing that was causing an extraordinary number of "SIE dropouts" per second, which was chewing up a bunch of CPU time. I haven't heard anything about that being fixed, so I would have to believe the problem still exists. JFS (an IBM developed journaling file system) was the worst all-around performer on Linux/390.
Mark Post -----Original Message----- From: Linux on 390 Port [mailto:[EMAIL PROTECTED] Behalf Of Daniel Jarboe Sent: Wednesday, March 10, 2004 11:03 AM To: [EMAIL PROTECTED] Subject: filesystem overhead This is not s390 specific, but I was wondering if anyone has any good links or references to information comparing overhead of different filesystems, either disk or CPU. Particularly any that compare disk overhead for ext3 (I know the size of the journal will make a difference) and ntfs. Also, to copy filesystems I typically see tar piped to tar recommended... is there any reason to favor that method over "cp -a" on systems that support it? ----------------------------------------------------------------------- This message is the property of Time Inc. or its affiliates. It may be legally privileged and/or confidential and is intended only for the use of the addressee(s). No addressee should forward, print, copy, or otherwise reproduce this message in any manner that would allow it to be viewed by any individual not originally listed as a recipient. If the reader of this message is not the intended recipient, you are hereby notified that any unauthorized disclosure, dissemination, distribution, copying or the taking of any action in reliance on the information herein is strictly prohibited. If you have received this communication in error, please immediately notify the sender and delete this message. Thank you. ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
