Re: [zfs-discuss] Is it safe to disable the swap partition?
I know that according to the documentation Solaris is supposed to be fully operational in the absences of swap devices. However, I've experienced cases which I have not been able to trace the root cause of yet where the disk access has increased drastically and caused the system to hang but it may be more of a performance issue. One concern is that I have applications that create a lot of /tmp files and they may end up consuming all RAM. I assume /tmp files cannot be swapped out to give room for new processes without a swap device so the malloc failures in the applications will come much sooner. I wonder if cached files or process pages have the highest priority of not being swapped out in the Solaris swap policy? /Karl D -- This message posted from opensolaris.org ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
[zfs-discuss] Is it safe to disable the swap partition?
If I want to reduce the I/O accesses for example to SSD media on a laptop and I don't plan to run any big applications is it safe to delete the swap file ? How do I configure opensolairs to run without swap ? I've tried 'swap -d /dev/zvol/dsk/rpool/swap' but 'swap -s' still shows the same amount of memory allocated. What happens with the /tmp file system when there is no swap device? I suppose it could fill up the RAM and cause a crash if not limited. Is there any other potential problem in running without swap? Any suggestion would be appreciated Thanks, -- This message posted from opensolaris.org ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] Problem with mounting ZFS from USB drive
Thanks for the great tips. I did some more testing and indeed it was a version issue. The pool was created under: # zpool upgrade This system is currently running ZFS version 14. whereas I tried it on systems with versions 10 and 12. It could be imported on a newer system using -f option. I suppose it did not auto mount the pool because it had the same name as existing pools. Is this a known issue with ZFS ? I assume because of this portability issue ZFS is not really suitable for use on removable media such as USB drives that are intended to be mounted on different hosts which may have different Solaris versions. It may be better to stick with UFS for this case. /KarlD -- This message posted from opensolaris.org ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
[zfs-discuss] Problem with mounting ZFS from USB drive
I'm a new user of ZFS and I have an external USB drive which contains a ZFS pool with file system. It seems that it does not get auto mounted when I plug in the drive. I'm running osol-0811. How can I manually mount this drive? It has a pool named rpool on it. Is there any diagnostics commands that can be used to investigate the contents of the pool or repair a damaged file system ? rmformat shows that the physical name of the USB device is: /dev/rdsk/c4t0d0p0 If I try '# zpool import I get: pool: rpool id: 3765122753259138111 state: UNAVAIL status: The pool was last accessed by another system. action: The pool cannot be imported due to damaged devices or data. see: http://www.sun.com/msg/ZFS-8000-EY config: rpool UNAVAIL newer version c4t0d0s0 ONLINE I suppose this means that the data is corrupted in some way although I never observed any write errors when it was created. This drive was formatted with zfs by the osol-0906 installer. Another question is about backward compatibility of ZFS. If I create a ZFS system under say osol-0906 can I access this system on older nv builds and Solaris 10 ? Thanks /Karl D -- This message posted from opensolaris.org ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
