search for: zfs_best_practices_guide

Displaying 20 results from an estimated 31 matches for "zfs_best_practices_guide".

2007 Sep 17
4
ZFS Evil Tuning Guide
Tuning should not be done in general and Best practices should be followed. So get very much acquainted with this first : http://www.solarisinternals.com/wiki/index.php/ZFS_Best_Practices_Guide Then if you must, this could soothe or sting : http://www.solarisinternals.com/wiki/index.php/ZFS_Evil_Tuning_Guide So drive carefully. -r
2007 Feb 13
4
Best Practises => Keep Pool Below 80%?
In the ZFS Best Practises Guide here: http://www.solarisinternals.com/wiki/index.php/ZFS_Best_Practices_Guide It says: ``Currently, pool performance can degrade when a pool is very full and file systems are updated frequently, such as on a busy mail server. Under these circumstances, keep pool space under 80% utilization to maintain pool performance.'''' What''s...
2009 Oct 22
1
raidz "ZFS Best Practices" wiki inconsistency
<http://www.solarisinternals.com/wiki/index.php/ZFS_Best_Practices_Guide#RAID-Z_Configuration_Requirements_and_Recommendations> says that the number of disks in a RAIDZ should be (N+P) with N = {2,4,8} and P = {1,2}. But if you go down the page just a little further to the thumper configuration examples, none of the 3 examples follow this recommendation! I will hav...
2008 Dec 19
4
ZFS boot and data on same disk - is this supported?
I have read the ZFS best practice guide located at http://www.solarisinternals.com/wiki/index.php/ZFS_Best_Practices_Guide However I have questions whether we support using slices for data on the same disk as we use for ZFS boot. What issues does this create if we have a disk failure in a mirrored environment? Does anyone have examples of customers doing this in production environments. I have a customer looking t...
2010 Jan 28
16
Large scale ZFS deployments out there (>200 disks)
While thinking about ZFS as the next generation filesystem without limits I am wondering if the real world is ready for this kind of incredible technology ... I''m actually speaking of hardware :) ZFS can handle a lot of devices. Once in the import bug (http://bugs.opensolaris.org/bugdatabase/view_bug.do?bug_id=6761786) is fixed it should be able to handle a lot of disks. I want to
2009 Aug 05
2
?: SMI vs. EFI label and a disk''s write cache
For Solaris 10 5/09... There are supposed to be performance improvements if you create a zpool on a full disk, such as one with an EFI label. Does the same apply if the full disk is used with an SMI label, which is required to boot? I am trying to determine the trade-off, if any, of having a single rpool on cXtYd0s2, if I can even do that, and improved performance compared to having two
2008 Sep 14
10
ZFS system requirements
Hi, this says that opensolaris only requires 512MB ram: http://dlc.sun.com/osol/docs/content/IPS/sysreq.html This says 1GB ram and a 64bit processor are recommended: http://www.solarisinternals.com/wiki/index.php/ZFS_Best_Practices_Guide#Memory_and_Swap_Space Am I going to have problems if I run opensolaris and zfs at the minimum requirements? -- This message posted from opensolaris.org
2010 Apr 28
3
Solaris 10 default caching segmap/vpm size
Whats the default size of the file system cache for Solaris 10 x86 and can it be tuned? I read various posts on the subject and its confusing.. -- This message posted from opensolaris.org
2007 Nov 15
3
read/write NFS block size and ZFS
Hello all... I''m migrating a nfs server from linux to solaris, and all clients(linux) are using read/write block sizes of 8192. That was the better performance that i got, and it''s working pretty well (nfsv3). I want to use all the zfs'' advantages, and i know i can have a performance loss, so i want to know if there is a "recomendation" for bs on nfs/zfs, or
2008 Nov 26
9
ZPool and Filesystem Sizing - Best Practices?
...re-evaulating our working practices. A few questions then. Apologies if these have been asked recently, I went back through a month''s worth of posts and couldn''t see anything. I''ve also read the best practices guide here: http://www.solarisinternals.com/wiki/index.php/ZFS_Best_Practices_Guide#ZFS_Administration_Considerations Pointers to additional info are most welcome! 1. Do these kinds of self-imposed limitations make any sense in a zfs world? 2. What is the ''logical corruption boundry'' for a zfs system - the filesystem or the zpool? 3. Are there scenarios apa...
2007 Sep 26
9
Rule of Thumb for zfs server sizing with (192) 500 GB SATA disks?
I''m trying to get maybe 200 MB/sec over NFS for large movie files (need large capacity to hold all of them). Are there any rules of thumb on how much RAM is needed to handle this (probably RAIDZ for all the disks) with zfs, and how large a server should be used? The throughput required is not so large, so I am thinking an X4100 M2 or X4150 should be plenty. This message posted from
2008 Feb 19
1
ZFS and small block random I/O
Hi, We''re doing some benchmarking at a customer (using IOzone) and for some specific small block random tests, performance of their X4500 is very poor (~1.2 MB/s aggregate throughput for a 5+1 RAIDZ). Specifically, the test is the IOzone multithreaded throughput test of an 8GB file size and 8KB record size, with the server physmem''d to 2GB. I noticed a couple of peculiar
2008 Sep 11
4
ZFS Panicing System Cluster Crash effect
Issues with ZFS and Sun Cluster If a cluster node crashes and HAStoragePlus resource group containing ZFS structure (ie. Zpool) is transitioned to a surviving node, the zpool import can cause the surviving node to panic. Zpool was obviously not exported in controlled fashion because of hard crash. Storage structure is - HW RAID protected LUN from array. Zpool build on single HW LUN. Zpool created
2009 Mar 04
5
Oracle database on zfs
Hi, I am wondering if there is a guideline on how to configure ZFS on a server with Oracle database? We are experiencing some slowness on writes to ZFS filesystem. It take about 530ms to write a 2k data. We are running Solaris 10 u5 127127-11 and the back-end storage is a RAID5 EMC EMX. This is a small database with about 18gb storage allocated. Is there a tunable parameters that we can apply to
2009 Sep 08
4
Can ZFS simply concatenate LUNs (eg no RAID0)?
Hi, I do have a disk array that is providing striped LUNs to my Solaris box. Hence I''d like to simply concat those LUNs without adding another layer of striping. Is this possibile with ZFS? As far as I understood, if I use zpool create myPool lun-1 lun-2 ... lun-n I will get a RAID0 striping where each data block is split across all "n" LUNs. If that''s
2007 Apr 19
14
Permanently removing vdevs from a pool
Is it possible to gracefully and permanently remove a vdev from a pool without data loss? The type of pool in question here is a simple pool without redundancies (i.e. JBOD). The documentation mentions for instance offlining, but without going into the end results of doing that. The thing I''m looking for is an option to evacuate, for the lack of a better word, the data from a specific
2008 Oct 31
14
questions on zfs backups
On Thu, Oct 30, 2008 at 11:05 PM, Richard Elling <Richard.Elling at sun.com> wrote: > Philip Brown wrote: >> I''ve recently started down the road of production use for zfs, and am hitting my head on some paradigm shifts. I''d like to clarify whether my understanding is correct, and/or whether there are better ways of doing things. >> I have one question for
2009 Feb 17
32
Backing up ZFS snapshots
I have an OpenSolaris snv_105 server at home that holds my photos, docs, music, etc, in a zfs pool. I backup my laptops with rsync to the OpenSolaris server. All of my important data is in one place, on the OpenSolaris server. I want to backup this data. I want to protect against losing my data, and I would also like to recover previous versions of files when I make mistakes. * I do not have a
2010 Jun 16
10
At what level does the “zfs” directory exist?
I?ve posted a query regarding the visibility of snapshots via CIFS here (http://opensolaris.org/jive/thread.jspa?threadID=130577&tstart=0) however, I?m beginning to suspect that it may be a more fundamental ZFS question so I?m asking the same question here. At what level does the ?zfs? directory exist? If the ?.zfs? subdirectory only exists as the direct child of the mount point then can
2010 Mar 03
6
Question about multiple RAIDZ vdevs using slices on the same disk
Hi all :) I''ve been wanting to make the switch from XFS over RAID5 to ZFS/RAIDZ2 for some time now, ever since I read about ZFS the first time. Absolutely amazing beast! I''ve built my own little hobby server at home and have a boatload of disks in different sizes that I''ve been using together to build a RAID5 array on Linux using mdadm in two layers; first layer is