Mailinglist Archive: opensuse (3506 mails)
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Re: [SLE] File limits
- From: David Bolt <fhfr-yva-r@xxxxxxxxxx>
- Date: Thu, 21 Sep 2006 01:26:08 +0000 (UTC)
- Message-id: <2eFPlMv2neEFFwJ0@xxxxxxxxxxxxxxxxxxx>
On Wed, 20 Sep 2006, "Marlier, Ian" <ian.marlier@xxxxxxxxxxxxxxxxxxx>
wrote:-
>Any number of filesystems have a 2GB limit on filesize (and it can cause
>big big issues at times!). A default install of (for example) SuSE 9.1
>-- just a couple of years back -- used a version of ext2/3 as its
>default FS, and that was susceptible to this condition.
I've yet to see a version of ext2/ext3 that had a 2GB limit, and if the
version of ext2/ext3 shipped with 9.1 really did have this limitation,
it was a very large step backwards from that supplied with 9.0[0]:
davjam@dav2:~> cat /etc/SuSE-release
SuSE Linux 9.0 (i586)
VERSION = 9.0
davjam@dav2:~> df
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/hda11 1929068 788312 1042764 44% /
/dev/hda1 31077 9333 20140 32% /boot
/dev/hda5 1929068 54896 1776180 3% /root
/dev/hda6 3850292 890772 2763932 25% /home
/dev/hda7 9621848 4266156 4866916 47% /suse
/dev/hda8 489992 12365 452327 3% /tmp
/dev/hda10 3850292 78156 3576548 3% /srv
/dev/hda12 3850292 1312932 2341772 36% /opt
/dev/hda13 8657308 3396544 4820988 42% /usr
/dev/hda15 1312368 225212 1020488 19% /var/lib
/dev/hda9 489992 268548 196144 58% /var/log
/dev/hda14 38456308 691712 35811096 2% /media/backups
tmpfs 150200 0 150200 0% /dev/shm
davjam@dav2:~> sudo grep /media/backups /etc/fstab
Password:
/dev/hda14 /media/backups ext3 noexec 1 1
davjam@dav2:~> dd if=/dev/zero of=/media/backups/blank.file count=4100 bs=1M
4100+0 records in
4100+0 records out
davjam@dav2:~> ls -l /media/backups/blank.file
-rw-rw-r-- 1 davjam users 4299161600 2006-09-21 02:12 /media/backups/blank.file
davjam@dav2:~> ls -lh /media/backups/blank.file
-rw-rw-r-- 1 davjam users 4.1G 2006-09-21 02:12 /media/backups/blank.file
Since the above blank file is 4,100MiB, created on an ext3 file-system,
using SuSE 9.0, I doubt 9.1 would be unable to create a similar sized
file.
>I'm assuming that reiser isn't vulnerable, and that the newer ext2/ext3
>versions in later releases aren't, but haven't tried to find out :-)
Reiser, ext2, ext3 are all capable of creating much larger files than
2GB. I was building the DVD ISOs for 10.0 and 10.1 during testing on a
9.0 machine. Now they're usually built on a 10.0 machine, still using
ext3, and not once have I have a problem building the roughly 3.3GB ISO.
[0] I'd actually perform the same test on a 9.1 machine but the only
partition that has more than 2GB free space is also the one that holds a
local copy of the 9.1 DVD, is mounted read-only, and would require me
being root to do the testing. Unfortunately, due to the age of the
machine in question, and it being a laptop with a slow IDE bus, I don't
feel safe leaving it with a root console open while it does the exact
same test.
Regards,
David Bolt
--
Member of Team Acorn checking nodes at 50 Mnodes/s: http://www.distributed.net/
AMD1800 1Gb WinXP/SUSE 9.3 | AMD2400 256Mb SuSE 9.0 | A3010 4Mb RISCOS 3.11
AMD2400(32) 768Mb SUSE 10.0 | Falcon 14Mb TOS 4.02 | A4000 4Mb RISCOS 3.11
AMD2600(64) 512Mb SUSE 10.0 | | RPC600 129Mb RISCOS 3.6
wrote:-
>Any number of filesystems have a 2GB limit on filesize (and it can cause
>big big issues at times!). A default install of (for example) SuSE 9.1
>-- just a couple of years back -- used a version of ext2/3 as its
>default FS, and that was susceptible to this condition.
I've yet to see a version of ext2/ext3 that had a 2GB limit, and if the
version of ext2/ext3 shipped with 9.1 really did have this limitation,
it was a very large step backwards from that supplied with 9.0[0]:
davjam@dav2:~> cat /etc/SuSE-release
SuSE Linux 9.0 (i586)
VERSION = 9.0
davjam@dav2:~> df
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/hda11 1929068 788312 1042764 44% /
/dev/hda1 31077 9333 20140 32% /boot
/dev/hda5 1929068 54896 1776180 3% /root
/dev/hda6 3850292 890772 2763932 25% /home
/dev/hda7 9621848 4266156 4866916 47% /suse
/dev/hda8 489992 12365 452327 3% /tmp
/dev/hda10 3850292 78156 3576548 3% /srv
/dev/hda12 3850292 1312932 2341772 36% /opt
/dev/hda13 8657308 3396544 4820988 42% /usr
/dev/hda15 1312368 225212 1020488 19% /var/lib
/dev/hda9 489992 268548 196144 58% /var/log
/dev/hda14 38456308 691712 35811096 2% /media/backups
tmpfs 150200 0 150200 0% /dev/shm
davjam@dav2:~> sudo grep /media/backups /etc/fstab
Password:
/dev/hda14 /media/backups ext3 noexec 1 1
davjam@dav2:~> dd if=/dev/zero of=/media/backups/blank.file count=4100 bs=1M
4100+0 records in
4100+0 records out
davjam@dav2:~> ls -l /media/backups/blank.file
-rw-rw-r-- 1 davjam users 4299161600 2006-09-21 02:12 /media/backups/blank.file
davjam@dav2:~> ls -lh /media/backups/blank.file
-rw-rw-r-- 1 davjam users 4.1G 2006-09-21 02:12 /media/backups/blank.file
Since the above blank file is 4,100MiB, created on an ext3 file-system,
using SuSE 9.0, I doubt 9.1 would be unable to create a similar sized
file.
>I'm assuming that reiser isn't vulnerable, and that the newer ext2/ext3
>versions in later releases aren't, but haven't tried to find out :-)
Reiser, ext2, ext3 are all capable of creating much larger files than
2GB. I was building the DVD ISOs for 10.0 and 10.1 during testing on a
9.0 machine. Now they're usually built on a 10.0 machine, still using
ext3, and not once have I have a problem building the roughly 3.3GB ISO.
[0] I'd actually perform the same test on a 9.1 machine but the only
partition that has more than 2GB free space is also the one that holds a
local copy of the 9.1 DVD, is mounted read-only, and would require me
being root to do the testing. Unfortunately, due to the age of the
machine in question, and it being a laptop with a slow IDE bus, I don't
feel safe leaving it with a root console open while it does the exact
same test.
Regards,
David Bolt
--
Member of Team Acorn checking nodes at 50 Mnodes/s: http://www.distributed.net/
AMD1800 1Gb WinXP/SUSE 9.3 | AMD2400 256Mb SuSE 9.0 | A3010 4Mb RISCOS 3.11
AMD2400(32) 768Mb SUSE 10.0 | Falcon 14Mb TOS 4.02 | A4000 4Mb RISCOS 3.11
AMD2600(64) 512Mb SUSE 10.0 | | RPC600 129Mb RISCOS 3.6
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