similar to: Balancing reads across mirror sets

Hello everyone, I''m wondering if the following makes sense: To configure a system for high IOPS, I want to have a zpool of 15K RPM SAS drives. For high IOPS, I believe it is best to let ZFS stripe them, instead of doing a raidz1 across them. Therefore, I would like to mirror the drives for reliability. Now, I''m wondering if I can get away with using a large capacity 7200

Hello, When approaching hosting providers for services, the first question many of them asked us was about the amount of IOPS the disk system should support. While we stress-tested our service, we recorded between 4000 and 6000 "merged io operations per second" as seen in "iostat -x" and collectd (varies between the different components of the system, we have a few such

Interesting flash technology overview and SSD review here: http://www.anandtech.com/cpuchipsets/intel/showdoc.aspx?i=3403 and another review here: http://www.tomshardware.com/reviews/Intel-x25-m-SSD,2012.html Regards, -- Al Hopper Logical Approach Inc,Plano,TX al at logical-approach.com Voice: 972.379.2133 Timezone: US CDT OpenSolaris Governing Board (OGB) Member - Apr 2005

for s10u2, documentation recommends 3 to 9 devices in raidz. what is the basis for this recommendation? i assume it is performance and not failure resilience, but i am just guessing... [i know, recommendation was intended for people who know their raid cold, so it needed no further explanation] thanks... oz -- ozan s. yigit | oz at somanetworks.com | 416 977 1414 x 1540 I have a hard time

Hi, for what it''s worth: There''s now a new Live CD for Solaris called Damm Small Solaris: http://www.sunhelp.ru/archives/179-Damn_Small_Solaris_0.1.1_English_Page.html In contrast to Belenix this Live CD works in Qemu - even without kqemu load the performance is not so bad. One important missing are the network driver for the network adapter emulated by Qemu. But they

Hi all, I''m putting together a OpenSolaris ZFS-based system and need help picking hardware. I''m thinking about using this 26-disk case: [FYI: 2-disk RAID1 for the OS & 4*(4+2) RAIDZ2 for SAN] http://rackmountpro.com/productpage.php?prodid=2418 Regarding the mobo, cpus, and memory - I searched goggle and the ZFS site and all I came up with so far is that, for a

Hi all, I''m putting together a OpenSolaris ZFS-based system and need help picking hardware. I''m thinking about using this 26-disk case: [FYI: 2-disk RAID1 for the OS & 4*(4+2) RAIDZ2 for SAN] http://rackmountpro.com/productpage.php?prodid=2418 Regarding the mobo, cpus, and memory - I searched goggle and the ZFS site and all I came up with so far is that, for a

Cc the QEMU Block Layer mailing list (qemu-block@nongnu.org), who might have more insights here; and wrap long lines. On Mon, May 28, 2018 at 06:07:51PM +0800, Chunguang Li wrote: > Hi, everyone. > > Recently I am doing some tests on the VM storage+memory migration with > KVM/QEMU/libvirt. I use the following migrate command through virsh: > "virsh migrate --live

Hello, I am a relatively new user of Xen virtualization, so you''ll have to forgive the simplistic nature of my question. I have a Dell R410 poweredge server (dual quad core CPUs + 32gb ram). I plan on utilizing this server with Xen. The ''dilemma'' I am having is whether or not to replace the 2x 500gb 7.2K RPM drives that came with the server with faster 300gb

Hi, as I have learned from the discussion about which SSD to use as ZIL drives, I stumbled across this article, that discusses short stroking for increasing IOPs on SAS and SATA drives: http://www.tomshardware.com/reviews/short-stroking-hdd,2157.html Now, I am wondering if using a mirror of such 15k SAS drives would be a good-enough fit for a ZIL on a zpool that is mainly used for file

I have a supermicro AOC-SAT2-MV8 and am having some issues getting drives to work. From what I can tell, my cables are to long to use with SATA2. I got some drives to work by jumpering them down to sata1, but other drives I can''t jumper without opening the case and voiding the drive warranty. Does anyone know if there is a system setting to drop it back to SATA1? I use zfs on a raid2 if

John R Pierce wrote: > On 11/2/2017 9:21 AM, hw wrote: >> Richard Zimmerman wrote: >>> hw wrote: >>>> Next question: you want RAID, how much storage do you need? Will 4 or 8 3.5" drives be enough (DO NOT GET crappy 2.5" drives - they're *much* more expensive than the 3.5" drives, and >smaller disk space. For the price of a 1TB 2.5", I can

Hi What are the disk IOPS required for Asterisk call recording? I am trying to find out number of disks required in RAID array to record 500 calls. Is there any formula to calculate IOPS required by Asterisk call recording? This will help me to find IOPS for different scale. If I assume that Asterisk will write data on disk every second for each call, I will need disk array to support minimum

Hi, How can we horizontally scale Dovecot across multiple servers? Do we require to install independent instances of Dovecot on each server? We are planning to use a NAS/SAN device using ZFS or EFS for email storage. Each logical unit will be of 10TB and similarly as the no: of user increases we are planning to add multiple 10TB units. In this case how we can manage the email storage on

Recently, I''ve been reading through the ZIL/slog discussion and have the impression that a lot of folks here are (like me) interested in getting a viable solution for a cheap, fast and reliable ZIL device. I think I can provide such a solution for about $200, but it involves a lot of development work. The basic idea: the main problem when using a HDD as a ZIL device are the cache flushes

While I understand everything at Oracle is "top secret" these days. Does anyone have any insight into a next-gen X4500 / X4540? Does some other Oracle / Sun partner make a comparable system that is fully supported by Oracle / Sun? http://www.oracle.com/us/products/servers-storage/servers/previous-products/index.html What do X4500 / X4540 owners use if they''d like more

Hi: I need advice on implementing a storage server. I really do not have the $ to spend for a Dell iSCSI storage divice and I am thinking trunning CentOS 5.x with ftp or FreeNAS. Here is what I am looking at and concerned about. Situation: My current storage needs are approximately 1.5 TB annually. This will increase to about 3.5 TB annually over the next 5 years (rough est.). This box

Announcing new direction of Open Source NexentaOS development: NexentaCP (Nexenta Core Platform). NexentaCP is Dapper/LTS-based core Operating System Platform distributed as a single-CD ISO, integrates Installer/ON/NWS/Debian and provides basis for Network-type installations via main or third-party APTs (NEW). First "unstable" b65-based ISO with ZFS/Boot-capable installer available as

Hi, I''m referring to; http://bugs.opensolaris.org/bugdatabase/view_bug.do?bug_id=6977913 It should be in Solaris 11 Express, has anyone tried this? How this is supposed to work? Any documentation available? Yours Markus Kovero -------------- next part -------------- An HTML attachment was scrubbed... URL:

Article by Jeff Layton: http://www.linux-mag.com/id/7839 anyone have views on whether this sort of caching would be useful for the MDT? My feeling is that MDT reads are probably pretty random but writes might benefit...? GREG -- Greg Matthews 01235 778658 Senior Computer Systems Administrator Diamond Light Source, Oxfordshire, UK