similar to: zfs_nocacheflush, nvram, and root pools

A question regarding zfs_nocacheflush: The Evil Tuning Guide says to only enable this if every device is protected by NVRAM. However, is it safe to enable zfs_nocacheflush when I also have local drives (the internal system drives) using ZFS, in particular if the write cache is disabled on those drives? What I have is a local zfs pool from the free space on the internal drives, so I''m

Hi, I read some articles on solarisinternals.com like "ZFS_Evil_Tuning_Guide" on http://www.solarisinternals.com/wiki/index.php/ZFS_Evil_Tuning_Guide . They clearly suggest to disable cache flush http://www.solarisinternals.com/wiki/index.php/ZFS_Evil_Tuning_Guide#FLUSH . It seems to be the only serious article on the net about this subject. Could someone here state on this

Hi, I''m running SunOS Release 5.10 Version Generic_118855-36 64-bit and in [b]/etc/system[/b] I put: [b]set zfs:zfs_nocacheflush = 1[/b] And after rebooting, I get the message: [b]sorry, variable ''zfs_nocacheflush'' is not defined in the ''zfs'' module[/b] So is this variable not available in the Solaris kernel? I''m getting really poor

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 hi, i''m trying to use the nfsv3 provider on S10U6, with the following simple script: #! /usr/sbin/dtrace -s #pragma D option quiet nfsv3:::op-read-start { printf("%s\n", args[1]->noi_curpath); } however, when running it, i get the following error: dtrace: failed to compile script ./nfs2.d: line 5: failed to grab

Nicolas Dorfsman wrote: > Le 27 nov. 07 ? 16:17, Torrey McMahon a ?crit : > >> According to the array vendor the 99xx arrays no-op the cache flush >> command. No need to set the /etc/system flag. >> >> http://blogs.sun.com/torrey/entry/zfs_and_99xx_storage_arrays >> >> > > > Perfect ! > > Thanks Torrey. > > Just realize

Greetings, Last April, in this discussion... http://www.opensolaris.org/jive/thread.jspa?messageID=143517 ...we never found out how (or if) the Sun 6120 (T4) array can be configured to ignore cache flush (sync-cache) requests from hosts. We''re about to reconfigure a 6120 here for use with ZFS (S10U4), and the evil tuneable zfs_nocacheflush is not going to serve us well (there is a ZFS

We''re using some X4540s, with OpenSolaris 2008.11. According to my testing, to optimize our systems for our specific workload, I''ve determined that we get the best performance with the write cache disabled on every disk, and with zfs:zfs_nocacheflush=1 set in /etc/system. The only issue is setting the write cache permanently, or at least quickly. Right now, as it is,

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 hi, i have two systems, A (Solaris 10 update 5) and B (Solaris 10 update 6). i''m using ''zfs send -i'' to replicate changes on A to B. however, the ''zfs recv'' on B is running extremely slowly. if i run the zfs send on A and redirect output to a file, it sends at 2MB/sec. but when i use ''zfs send

Is it true that Solaris 10 u4 does not have any of the nice ZIL controls that exist in the various recent Open Solaris flavors? I would like to move my ZIL to solid state storage, but I fear I can''t do it until I have another update. Heck, I would be happy to just be able to turn the ZIL off to see how my NFS on ZFS performance is effected before spending the $''s. Anyone

I''m running Postgresql (v8.1.10) on Solaris 10 (Sparc) from within a non-global zone. I originally had the database "storage" in the non-global zone (e.g. /var/local/pgsql/data on a UFS filesystem) and was getting performance of "X" (e.g. from a TPC-like application: http://www.tpc.org). I then wanted to try relocating the database storage from the zone (UFS

This may not be a ZFS issue, so please bear with me! I have 4 internal drives that I have striped/mirrored with ZFS and have an application server which is reading/writing to hundreds of thousands of files on it, thousands of files @ a time. If 1 client uses the app server, the transaction (reading/writing to ~80 files) takes about 200 ms. If I have about 80 clients attempting it @ once, it can

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi, I'm using Dovecot 1.2.9. I configured it like this: % ./configure --prefix=/opt/rt --libdir=/opt/rt/lib \ --libexecdir=/opt/rt/lib [other args...] It compiled fine, but failed to install, because it tries to install a directory called <libdir>/dovecot/imap, and a file called <libexecdir>/dovecat/imap, which obviously

Hi all, yesterday we had a drive failure on a fc-al jbod with 14 drives. Suddenly the zpool using that jbod stopped to respond to I/O requests and we get tons of the following messages on /var/adm/messages: Sep 3 15:20:10 fb2 scsi: [ID 107833 kern.warning] WARNING: /scsi_vhci/disk at g20000004cfd81b9f (sd52): Sep 3 15:20:10 fb2 SCSI transport failed: reason ''timeout'':

I have a lot of people whispering "zfs" in my virtual ear these days, and at the same time I have an irrational attachment to xfs based entirely on its lack of the 32000 subdirectory limit. I''m not afraid of ext4''s newness, since really a lot of that stuff has been in Lustre for years. So a-benchmarking I went. Results at the bottom:

Hi, I was wondering if anybody was using a UMEM <http://www.umem.com/> NVRAM card [the MM5415 family] as an external journal for ext3. According to the help text in 2.6.7 config, it doesn't have a major number assigned so it chooses one dynamically. It suggests to use 'devfs' (which I thought was deprecated in 2.6.x) or look in /proc/devices. I was wondering if anybody was using

Hi, I am currently using libvirt API(java api) for creating VMs in esxi host. I am passing commands as follows:(trying from terminal) virsh -c esx://192.168.0.144?no_verify=1 define /home/bm/eee.xml Domain eee defined from /home/bm/eee.xml I have attached the eee.xml file and the eee.vmx from the esxi datastore with this mail. the versions i am using is : virsh # version Compiled against

<div dir='auto'>Hi,<div dir="auto"><br></div><div dir="auto">how do I set the BootOrder variable in an NVRAM file for UEFI boot?</div><div dir="auto">Is there a way to configure a domain with the bios qemu option instead of pflash?</div><div dir="auto"><br></div><div

Does anyone know of a means of backing up/restoring the settings in a systems non-volatile ram under CentOS? regards Phil Vossler westek TECHNOLOGY www.westekuk.com Telephone +44 (0)1225 790600 Fax +44 (0)1225 702968 Westek Technology Limited, Unit 1 Lancaster Park Industrial Estate, Bowerhill, Melksham, Wiltshire, SN12 6TT, UK. -------------- next part -------------- An HTML

On 11/03/16 12:08, Andy Walsh wrote: > Hi, > > i try to create a openWRT Samba 4.3 package and stumbled across the fact > that samba 4.3 will create those message socks inside the private-dir. That > results in creating entries inside /etc/samba/msg.sock. > > On openWRT /var is a tempFS in ram, so anything there is not a problem > regarding nvram and wear leveling. Yet the

Rowland penny <rpenny <at> samba.org> writes: > > On 11/03/16 12:08, Andy Walsh wrote: > > Hi, > > > > i try to create a openWRT Samba 4.3 package and stumbled across the fact > > that samba 4.3 will create those message socks inside the private-dir. That > > results in creating entries inside /etc/samba/msg.sock. > > > > On openWRT