search for: oltp

...rate --live --copy-storage-all --verbose vm1 > qemu+ssh://192.168.1.91/system tcp://192.168.1.91". I have checked the > libvirt debug output, and make sure that the drive-mirror + NBD > migration method is used. > > Inside the VM, I use an I/O benchmark (Iometer) to generate an oltp > workload. I record the I/O performance (IOPS) before/during/after > migration. When the migration begins, the IOPS dropped by 30%-40%. > This is reasonable, because the migration I/O competes with the > workload I/O. However, during almost the last period of migration > (which is 6...

HI, The question is a ZFS performance question in reguards to SAN traffic. We are trying to benchmark ZFS vx VxFS file systems and I get the following performance results. Test Setup: Solaris 10: 11/06 Dual port Qlogic HBA with SFCSM (for ZFS) and DMP (of VxFS) Sun Fire v490 server LSI Raid 3994 on backend ZFS Record Size: 128KB (default) VxFS Block Size: 8KB(default) The only thing

Any success stories using rails against a DB2 database on an as400? If so, how? Thanks Ed Schechter -- Posted via http://www.ruby-forum.com/.

Greeting All I have create a pool that consists oh a hard disk and a ssd as a cache zpool create hdd c11t0d0p3 zpool add hdd cache c8t0d0p0 - cache device I ran an OLTP bench mark to emulate a DMBS One I ran the benchmark, the pool started create the database file on the ssd cache device ??????????? can any one explain why this happening ? is not L2ARC is used to absorb the evicted data from ARC ? why it is used this way ??? -- Abdullah Al-Dahlawi Georg...

Hi @ all Does anyone has some experience with PostgreSQL and RoR? Does it gives any disadvantages or problems with PostgreSQL? I have a webapplication, that manage (read/write) many records (no. 200''000 records) and I search a ideal database. Actually, I have two options: - MySQL / - PostgreSQL And now, I would like to ascertain a good solution... Thx, ribit -- Posted via

Hello, Anyone using or tested Oracle (OLTP load) on NetApp? Connected via Fibre Channel not NFS. Performance is good or should we better stay with "classic" SAN storage like HP EVA or similar boxes from EMC or Hitachi? In EMC test papers NetApp does not look good. In NetApp papers - vice versa. :) So I'm somewhat conf...

...e-all --verbose vm1 > > qemu+ssh://192.168.1.91/system tcp://192.168.1.91". I have checked the > > libvirt debug output, and make sure that the drive-mirror + NBD > > migration method is used. > > > > Inside the VM, I use an I/O benchmark (Iometer) to generate an oltp > > workload. I record the I/O performance (IOPS) before/during/after > > migration. When the migration begins, the IOPS dropped by 30%-40%. > > This is reasonable, because the migration I/O competes with the > > workload I/O. However, during almost the last period of migrat...

...00 zfs(1) usage output is excessively long 6405330 swap on zvol isn''t added during boot 6405966 Hot Spare support in ZFS 6409228 typo in aclutils.h 6409302 passing a non-root vdev via zpool_create() panics system 6415739 assertion failed: !(zio->io_flags & 0x00040) 6416482 filebench oltp workload hangs in zfs 6416759 ::dbufs does not find bonus buffers anymore 6416794 zfs panics in dnode_reallocate during incremental zfs restore 6417978 double parity RAID-Z a.k.a. RAID6 6420204 root filesystem''s delete queue is not running 6421216 ufsrestore should use acl_set() for settin...

Hello, because of high disk load we plan to move from disk (raid1) to ssd. Are there recommendations for - manufacturer - file sytem - raid1 The Red Hat Storage Administration Guide says: - no raid 1 - ext4 only is this state of the art? I have searched list,centos.org 2015 - nothing found. I found in the year 2012 / 2013: https://www.centos.org/forums/viewtopic.php?t=7580

Does anyone have a best practice for utilizing ZFS with Hitachi SE99x0 arrays?? I''m curious about what type of parity-groups work best with ZFS for various application uses. Examples: OLTP, warehousing, NFS, ............. Thanks! This message posted from opensolaris.org

...Things are fine on an internal disk using the built-in SCSI controller on >my Dell PowerEdge 2600, but when using the PERC everything falls apart. >Any ideas as to where to look for the source of this problem? I noticed >that the document "Linux Filesystem Performance Comparison for OLTP with >Ext2, Ext3 ..." used a MegaRaid 1.73 so it's not like I'm using wacky >hardware here... > >Many thanks! > >Best regards, >Benjamin Wood >General Dynamics > > >

...by on Rails, PHP, Java Servlets, JSP, and Java backend applications. The environment includes a web- based client login interface, transaction processing systems, invoicing and payment systems, a corporate web site, ad serving and tracking, mass e-mail systems, as well as several backend and other OLTP systems. MySQL and Oracle are the current RDBMS used. Required Skills and Experience: * Bachelor''s degree in Computer Science or related field. * Experience with MySQL or Oracle, or other compatible SQL and PL/SQL. * Solid experience designing and programming a Ruby on Rails or Java web-...

...e July 4th week[end] and got no responses, let''s try it again...] As a perpetual Rails dabbler, I make an awful lot of typical beginner mistakes. And the logs are always either too verbose or too sparse to help me. And it started me thinking. I came from one of the largest production OLTP systems in the world, and the one thing that helped us manage troubleshooting in both development and production was extensive, obsessive, flexible logging. Every operation was logged. Every OS call was followed by an error check and a log message - and I mean EVERY call. On Stratus computer...

Hello ocfs2-users, I have 2 questions: 1. I forgot the block size and cluster size that I chose during formatting of the drive. Is there any way I can find it out afterwards? 2. And what's up with the block size-cluster size anyways? I could find any in-depth information regarding those parametres. what is it? When I tried using the default settings my disk space was being

As a perpetual Rails dabbler, I make an awful lot of typical beginner mistakes. And the logs are always either too verbose or too sparse to help me. And it started me thinking. I came from one of the largest production OLTP systems in the world, and the one thing that helped us manage troubleshooting in both development and production was extensive, obsessive, flexible logging. Every operation was logged. Every OS call was followed by an error check and a log message - and I mean EVERY call. On Stratus computers, s...

I am pretty new to Dtrace but use the Dtrace Toolkit when trying to troubleshoot I/O issues On Oracle. I am looking for help on how to do the following: I am trying to answer whether adding more HBA Cards/ports would be effective. To do this, I need to know the i/o''s per second As well as total bandwidth per second. Has anyone done this before? Does anyone have any other ideas on how

This is something for after the 1.0 release but I think it's important and I'm going to try to figure out how to make it happen. I'd like to see some way to pass outgoing email from Thunderbird back to dovecot through some new command that we would have to make up. Email would be sent back over the IMAP connection and when Dovecot gets it dovecot would hand it off to an SMTP

Hi, Does anyone have experiences about ARC-1883I SAS controller with CentOS7? I am planning to have RAID1 setup and I am wondering if I should use the controller's RAID functionality which has 2GB cache or should I go with JBOD + Linux software RAID? The disks I am going to use are 6TB Seagate Enterprise ST6000NM0034 7200rpm SAS/12Gbit 128 MB If hardware RAID is preferred, the

I know this is a bit off topic but we are using Asterisk :) Since this list is full of tech gurus w/ all different sorts of backgrounds, I thought I would get the best opinions here. We have several different switches and other telecom equipment at our facilities which all have their own proprietary cdr platforms, which are rather limited. The company I work for is looking to develop their

Hi, I''m running multiple vservers and have some aspects managed via puppet. I noticed that puppetd consumes from 20 to 60 mb RAM and the longer the process runs, the more RAM it takes. It looks like 60MB is the top what I measured. Having a couple of vservers (11 in my case) this can already take up to 500MB just for puppet! I''m wondering if there''s any downside in