Somewhere out there! » benchmark

Bookmarks for June 9th through June 12th

Nicholas Lee — Sat, 11 Jun 2011 13:00:41 +0000

These are my links for June 9th through June 12th:

Partition and Image Your Hard Drive with the System Rescue CD – Lifehacker –
Skype Out – Pidgin In | Linux Journal –
Duo Security: Two Factor Auth for the Masses « Cuddletech –
The consumerization of IT: Why most vendors get it wrong, and why it’s a real challenge today. (Part 1) – Brian Madden – BrianMadden.com –
Focus and Concentration – Minimizing Interruptions – Michael Sampson on Collaboration –
FreeNAS vs OpenSolaris ZFS Benchmarks » ZFS Build –
Bookmarks for June 8th through June 9th — Somewhere out there! – blog: Bookmarks for June 8th through June 9th: These are my links for June 8th through June 9th: Cheap GPUs Rend…

Bookmarks for May 24th through May 26th

Nicholas Lee — Thu, 26 May 2011 01:00:55 +0000

These are my links for May 24th through May 26th:

Ads Implant False Memories | Wired Science | Wired.com – Ads Implant False Memories: Vivid commercials are incredibly good at tricking the hippocampus (a center of long-…
Gabor hits Send: Organizing your Email into Folders is a Waste of Time – Organizing your Email into Folders is a Waste of Time: Here's a brand new paper from a conference in Vancouver l…
iPad App Review: TallyTots | Gear Diary –
Surprising results FC/NFS/iSCSI/FCoE… » Yellow Bricks –
Get the Important Things Done Without Exhausting Your Mental Energy – Lifehacker –
Bookmarks for May 21st through May 24th — Somewhere out there! – blog: Bookmarks for May 21st through May 24th: These are my links for May 21st through May 24th: Travel — Dragon…

Bookmarks for April 14th from 13:28 to 15:58

Nicholas Lee — Thu, 14 Apr 2011 04:00:28 +0000

These are my links for April 14th from 13:28 to 15:58:

Re: Fastest Chunk Size w/XFS For MD Software RAID = 1024k –
Filesystem performance tweaking with XFS on Linux@Everything2.com –
Linux Not Fully Prepared for 4096-Byte Sector Hard Drives –
Aligning an SSD on Linux –
[linux-lvm] does alignment work out of the box now – md_chunk_alignment
O+P Insights: Linux HW RAID Howto –
ReliableRaid – Ubuntu Wiki –
Mdadm-faq – Linux Raid Wiki – eg.
"
Array Slot : 2 (failed, 1, 0)
Array State : Uu 1 failed
"

Bookmarks for April 14th from 00:09 to 08:41

Nicholas Lee — Wed, 13 Apr 2011 21:00:21 +0000

These are my links for April 14th from 00:09 to 08:41:

kvm disk performance with different backends

Nicholas Lee — Mon, 12 Oct 2009 23:16:11 +0000

Here some results from testing I did in August 2009 on KVM with the three different disk image drivers. First a single disk system running Ubuntu x64 9.04:

QCOW2: /dev/vda: Timing cached reads: 9836 MB in 2.00 seconds = 4923.22 MB/sec Timing buffered disk reads: 1050 MB in 3.00 seconds = 349.92 MB/sec

RAW: /dev/vda: Timing cached reads: 10118 MB in 2.00 seconds = 5064.57 MB/sec Timing buffered disk reads: 1054 MB in 3.00 seconds = 351.32 MB/sec

LVM /dev/vda: Timing cached reads: 9328 MB in 2.00 seconds = 4668.90 MB/sec Timing buffered disk reads: 202 MB in 3.00 seconds = 67.26 MB/sec

qcow2,488M,61454,88,288839,43,61540,14,45880,57,445361,57,13550.6,99,16,+++++,+++,+++++,+++,+++++,+++,+++++,+++,+++++,+++,+++++,+++ raw ,488M,54972,86,54393,16,60636,17,68490,84,442091,43,6685.1,97,16,+++++,+++,+++++,+++,+++++,+++,+++++,+++,+++++,+++,+++++,+++ lvm ,488M,58248,90,62764,17,58271,19,64677,83,455263,38,7912.3,96,16,+++++,+++,+++++,+++,+++++,+++,+++++,+++,+++++,+++,+++++,+++

QCOW2 Version 1.03c ------Sequential Output------ --Sequential Input- --Random- -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks-- Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP vm2 488M 61454 88 288839 43 61540 14 45880 57 445361 57 13551 99 ------Sequential Create------ --------Random Create-------- -Create-- --Read--- -Delete-- -Create-- --Read--- -Delete-- files /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP 16 +++++ +++ +++++ +++ +++++ +++ +++++ +++ +++++ +++ +++++ +++ vm2,488M,61454,88,288839,43,61540,14,45880,57,445361,57,13550.6,99,16,+++++,+++,+++++,+++,+++++,+++,+++++,+++,+++++,+++,+++++,+++


RAW
Version 1.03c       ------Sequential Output------ --Sequential Input- --Random-

-Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--

Machine        Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP  /sec %CP

vm2            488M 54972  86 54393  16 60636  17 68490  84 442091  43  6685  97

------Sequential Create------ --------Random Create--------

-Create-- --Read--- -Delete-- -Create-- --Read--- -Delete--

files  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP

16 +++++ +++ +++++ +++ +++++ +++ +++++ +++ +++++ +++ +++++ +++

vm2,488M,54972,86,54393,16,60636,17,68490,84,442091,43,6685.1,97,16,+++++,+++,+++++,+++,+++++,+++,+++++,+++,+++++,+++,+++++,+++

LVM Version 1.03c ------Sequential Output------ --Sequential Input- --Random- -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks-- Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP vm2 488M 58248 90 62764 17 58271 19 64677 83 455263 38 7912 96 ------Sequential Create------ --------Random Create-------- -Create-- --Read--- -Delete-- -Create-- --Read--- -Delete-- files /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP 16 +++++ +++ +++++ +++ +++++ +++ +++++ +++ +++++ +++ +++++ +++ vm2,488M,58248,90,62764,17,58271,19,64677,83,455263,38,7912.3,96,16,+++++,+++,+++++,+++,+++++,+++,+++++,+++,+++++,+++,+++++,+++

Then a spreadsheet with a large set of test using Ubuntu x64 9.04 host with two ES SATA disks and LVM over raid1/md.

50% Performance Boost for Nehalem’s over Harpertown

Nicholas Lee — Wed, 07 Oct 2009 21:12:35 +0000

From the vmware blog:

Conclusion

A 1vCPU Xeon X5500 series based Exchange Server VM can support 50% more users per core than a 2vCPU VM based on previous generation processors while maintaining the same level of performance in terms of Sendmail latency. This is accomplished while the VM’s CPU utilization remains below 50%, allowing plenty of capacity for peaks in workload and making an FT VM practical for use with Exchange Server 2007.