Displaying 20 results from an estimated 1000 matches similar to: "SSD for Centos SWAP /tmp & /var/ partition"
2012 May 22
3
SSD erase state and reducing SSD wear
I''ve got two recent examples of SSDs. Their pristine state from the
manufacturer shows:
Device Model: OCZ-VERTEX3
# hexdump -C /dev/sdd
00000000 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|................|
*
1bf2976000
Device Model: OCZ VERTEX PLUS
(OCZ VERTEX 2E)
# hexdump -C /dev/sdd
00000000 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
|................|
*
2012 Nov 14
3
SSD ZIL/L2ARC partitioning
Hi,
I''ve ordered a new server with:
- 4x600GB Toshiba 10K SAS2 Disks
- 2x100GB OCZ DENEVA 2R SYNC eMLC SATA (no expander so I hope no SAS/
SATA problems). Specs: http://www.oczenterprise.com/ssd-products/deneva-2-r-sata-6g-2.5-emlc.html
I want to use the 2 OCZ SSDs as mirrored intent log devices, but as
the intent log needs quite a small amount of the disks (10GB?), I was
wondering
2012 May 17
6
SSD format/mount parameters questions
For using SSDs:
Are there any format/mount parameters that should be set for using btrfs
on SSDs (other than the "ssd" mount option)?
General questions:
How long is the ''delay'' for the delayed alloc?
Are file allocations aligned to 4kiB boundaries, or larger?
What byte value is used to pad unused space?
(Aside: For some, the erased state reads all 0x00, and for
2010 Jun 19
6
does sharing an SSD as slog and l2arc reduces its life span?
Hi,
I don''t know if it''s already been discussed here, but while
thinking about using the OCZ Vertex 2 Pro SSD (which according
to spec page has supercaps built in) as a shared slog and L2ARC
device it stroke me that this might not be a such a good idea.
Because this SSD is MLC based, write cycles are an issue here,
though I can''t find any number in their spec.
Why do I
2011 Oct 26
5
Indexes to MLC-SSD
Hi all,
is anyone on this list who dares/dared to store his index files on a
MLC-SSD?
Regards,
Patrick
2010 Feb 12
13
SSD and ZFS
Hi all,
just after sending a message to sunmanagers I realized that my question
should rather have gone here. So sunmanagers please excus ethe double
post:
I have inherited a X4140 (8 SAS slots) and have just setup the system
with Solaris 10 09. I first setup the system on a mirrored pool over
the first two disks
pool: rpool
state: ONLINE
scrub: none requested
config:
NAME
2010 Jun 25
13
OCZ Vertex 2 Pro performance numbers
Now the test for the Vertex 2 Pro. This was fun.
For more explanation please see the thread "Crucial RealSSD C300 and cache
flush?"
This time I made sure the device is attached via 3GBit SATA. This is also
only a short test. I''ll retest after some weeks of usage.
cache enabled, 32 buffers, 64k blocks
linear write, random data: 96 MB/s
linear read, random data: 206 MB/s
linear
2013 Jul 09
2
OCZ Vertex4 quirks
Same as its brothers/sisters, it's optimized for 4 KB blocks.
/*
* OCZ Vertex 4 SSDs
* 4k optimized
*/
{ T_DIRECT, SIP_MEDIA_FIXED, "ATA", "OCZ_VERTEX4*", "*"},
/*quirks/DA_Q_4K
Borja.
2010 Jun 12
5
program in Wine doesnt see SATA solid state drive
I have a 50 gig OCZ Vertex LE drive that needs a firmware update.
When I run the Windows only flash program in wine it doesnt see the SATA ssd drive it needs to flash.
I have booted off another hard disk.
I need administrator privileges to see the drive so I config'd wine for win98.
I also tried to manually add the drive in wine config by adding the /media/xxxx path and also manually
2009 Nov 05
7
Unexpected ENOSPC on a SSD-drive after day of uptime, kernel 2.6.32-rc5
I''ve just finished installing onto an OCZ Agilent v2 SSD with btrfs as
filesystem. However to my surprise I''ve hit an ENOSPC condition one
one of the partitions within less than a day of uptime, while the
filesystem on that partition only reported 50% to be in use, which is
far from the 75% limit people mention on the ML.
Note that this occurs using a vanilla 2.6.32-rc5 kernel
2008 Oct 15
2
Encrypting tmp swap and home
Hi everyone,
I added a page under the HowTos for Encryption, and then added a guide
for encrypting /tmp /swap and /home using cryptsetup and LUKS keys on
LVM, when you already have partitions setup.
http://wiki.centos.org/HowTos/EncryptTmpSwapHome
Regards,
Max
2012 Oct 03
1
OCZ Vertex3 SSD and LSI 9211-8i (mpt2sas)
I have a couple development servers running centos 6.3 64bit that have
LSI 9211-8i SAS2 controllers connected to a SAS2 backplane. these
work fine with SATA hard disks (populated with a bunch of 3TB SATA
drives)...
I'm trying to install a OCZ Vertex3 SSD on each of the two servers to do
some ssd caching tests... system sees the drive, so I do the following...
# parted -a min
2012 Aug 03
1
Guest disk (LVM on SSD) too slow. Xen unstable, DomU-win XP sp2
nice time, Xen community.
my DomU has very slow Disk performance, despite the usage of SSD''s. Maybe somebody can give some good tips to accelerate, or point out my mistakes.
DomU CristalDiskMark 3.0.1 test(roundet):
seq (R/W) :71 / 86 MB/s
512k(R/W) :76 / 80 MB/s
4K(R/W) :4 / 3 MB/s
4K QD32(R/W):4 / 4 MB/s
The same guest running in KVM-Qemu (standard installed on Ubuntu
2010 May 24
16
questions about zil
I recently got a new SSD (ocz vertex LE 50gb)
It seems to work really well as a ZIL performance wise. My question is, how
safe is it? I know it doesn''t have a supercap so lets'' say dataloss
occurs....is it just dataloss or is it pool loss?
also, does the fact that i have a UPS matter?
the numbers i''m seeing are really nice....these are some nfs tar times
before
2006 May 13
2
Centos and Dual Core Opteron in a Tyan Mobo
Hi folks, an Asterisk (www.asterisk.org) box will be built with the
following specs and I wanted to know if CENTOS has a built
process/config/parameter/special distro to target the AMD Opteron Dual
Core plataform:
2 amd opteron 265 dual core 1.8 Ghz 2mb l2 cache
2x1024 ocz c2-6400 dual channel gold GX XTC
2 Seagate 16mb cache 300 GB barracuda 7200 drives
another 2 Seagate 500 GB 16mb cache
2012 Oct 01
3
Best way to measure performance of ZIL
Hi all,
I currently have a OCZ Vertex 4 SSD as a ZIL device and am well aware of
their exaggerated claims of sustained performance. I was thinking about
getting a DRAM based ZIL accelerator such as Christopher George''s DDRDive,
one of the STEC products, etc. Of course the key question i''m trying to
answer is: is the price premium worth it?
--- What is the (average/min/max)
2009 Sep 19
0
memcached-1.4.1 and C4
Hi,
Is there someone successfully running memcached-1.4.1 on Centos 4 with
centosplus php? I'm trying to use memcached under Centos 4. I can set
values fine but
'get' returns:
[root at rakosnicek eshop]# php d.php
PHP Warning: Memcached::get(): bad type specifier while parsing
parameters in /var/www/d.php on line 6
NULL
string(7) "SUCCESS"
array(1) {
2010 Oct 06
14
Bursty writes - why?
I have a 24 x 1TB system being used as an NFS file server. Seagate SAS disks connected via an LSI 9211-8i SAS controller, disk layout 2 x 11 disk RAIDZ2 + 2 spares. I am using 2 x DDR Drive X1s as the ZIL. When we write anything to it, the writes are always very bursty like this:
ool 488K 20.0T 0 0 0 0
xpool 488K 20.0T 0 0 0 0
xpool
2009 Apr 11
17
Supermicro SAS/SATA controllers?
The standard controller that has been recommended in the past is the
AOC-SAT2-MV8 - an 8 port with a marvel chipset. There have been several
mentions of LSI based controllers on the mailing lists and I''m wondering
about them.
One obvious difference is that the Marvel contoller is PCI-X and the LSI
controllers are PCI-E.
Supermicro have several LSI controllers. AOC-USASLP-L8i with the
2007 Nov 09
1
CentOS 5: comment swap in fstab
I'm not sure what gave me this idea, but I decided
to comment out the swap partition in /etc/fstab
and reboot my laptop. I did not run swapoff directly at
any time.
I'm running more things now than I would ever dream of
to hammer my 500MB of memory, but I still notice NO
slowdown. This is the best desktop experience I've
ever had for any OS on any hardware!
Here's the first 12