search for: simplesystems

Displaying 20 results from an estimated 146 matches for "simplesystems".

2008 Feb 15
38
Performance with Sun StorageTek 2540
...ive even though the peak write speed is only 26MB/second (peak read is 42MB/second). Can someone share with me what they think the write bottleneck might be and how I can surmount it? Thanks, Bob ====================================== Bob Friesenhahn bfriesen at simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/ GraphicsMagick Maintainer, http://www.GraphicsMagick.org/ % zpool status pool: Sun_2540 state: ONLINE scrub: none requested config: NAME STATE READ WRITE CKSUM Sun_2540 ONLI...
2009 Apr 15
5
StorageTek 2540 performance radically changed
...CAM cache feature that I tweaked (to disable write mirring across controllers) is no longer present. Does anyone have advice as to how the performance may be improved with smaller block writes on huge files? Should I even care? Bob -- Bob Friesenhahn bfriesen at simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/ GraphicsMagick Maintainer, http://www.GraphicsMagick.org/
2009 Jun 10
13
Apple Removes Nearly All Reference To ZFS
http://hardware.slashdot.org/story/09/06/09/2336223/Apple-Removes-Nearly-All-Reference-To-ZFS
2006 Feb 28
6
File_column, RMagick, and watermarking
I''m working on a photo gallery and I''m using File_column to handle the uploads of the files and create my thumbnails, but does anyone here have any idea how to have a watermark (opaque text maybe) placed over one of the versions? Any ideas on how to go about this would be great. Even if it''s just straight RMagick code, that would be fine too. Thanks in advance for the
2009 Dec 08
1
Live Upgrade Solaris 10 UFS to ZFS boot pre-requisites?
...that this process should be used. The two documents do not seem to agree. Given that my system is essentially equivalent to U8, is there any reason to live upgrade to UFS U8 prior to ZFS U8 or can the more direct path be used? Bob -- Bob Friesenhahn bfriesen at simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/ GraphicsMagick Maintainer, http://www.GraphicsMagick.org/
2005 Dec 19
3
RMagick Resizing Issue
Hello ~ I have RMagick and file_column working in RoR. In my model I am setting up some standard sizes for the submitted photos. The photo files are created and named correctly, but the sizes are wrong. Only the second argument of my geometry call is used, with the width dimension being resized proportionately. file_column :image, :magick => { :versions => { "medium" =>
2009 Feb 18
4
Zpool scrub in cron hangs u3/u4 server, stumps tech support.
I''ve got a server that freezes when I run a zpool scrub from cron. Zpool scrub runs fine from the command line, no errors. The freeze happens within 30 seconds of the zpool scrub happening. The one core dump I succeeded in taking showed an arccache eating up all the ram. The server''s running Solaris 10 u3, kernel patch 127727-11 but it''s been patched and seems to have
2009 Dec 04
30
ZFS send | verify | receive
If there were a ?zfs send? datastream saved someplace, is there a way to verify the integrity of that datastream without doing a ?zfs receive? and occupying all that disk space? I am aware that ?zfs send? is not a backup solution, due to vulnerability of even a single bit error, and lack of granularity, and other reasons. However ... There is an attraction to ?zfs send? as an augmentation to the
2008 Sep 10
7
Intel M-series SSD
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
2009 Jul 24
6
When writing to SLOG at full speed all disk IO is blocked
Hello all... I''m seeing this behaviour in an old build (89), and i just want to hear from you if there is some known bug about it. I''m aware of the "picket fencing" problem, and that ZFS is not choosing right if write to slog is better or not (thinking if we have a better throughput from disks). But i did not find anything about 100% slog activity (~115MB/s) blocks
2008 May 21
11
Per-user home filesystems and OS-X Leopard anomaly
...ed OS-X system would operate more strangely than normal. The simple solution was to simply create a "/home/.DS_Store" directory on the server so that the mount request would succeed. Bob ====================================== Bob Friesenhahn bfriesen at simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/ GraphicsMagick Maintainer, http://www.GraphicsMagick.org/
2010 Apr 10
41
Secure delete?
Hi all Is it possible to securely delete a file from a zfs dataset/zpool once it''s been snapshotted, meaning "delete (and perhaps overwrite) all copies of this file"? Best regards roy -- Roy Sigurd Karlsbakk (+47) 97542685 roy at karlsbakk.net http://blogg.karlsbakk.net/ -- I all pedagogikk er det essensielt at pensum presenteres intelligibelt. Det er et element?rt imperativ
2009 Sep 24
5
Checksum property change does not change pre-existing data - right?
My understanding is that if I "zfs set checksum=<different>" to change the algorithm that this will change the checksum algorithm for all FUTURE data blocks written, but does not in any way change the checksum for previously written data blocks. I need to corroborate this understanding. Could someone please point me to a document that states this? I have searched and searched
2009 Jun 15
33
compression at zfs filesystem creation
Hi, I just installed 2009.06 and found that compression isn''t enabled by default when filesystems are created. Does is make sense to have an RFE open for this? (I''ll open one tonight if need be.) We keep telling people to turn on compression. Are there any situations where turning on compression doesn''t make sense, like rpool/swap? what about rpool/dump? Thanks, ~~sa
2008 Nov 26
9
ZPool and Filesystem Sizing - Best Practices?
Hello, We have a new Thor here with 24TB of disk in (first of many, hopefully). We are trying to determine the bext practices with respect to file system management and sizing. Previously, we have tried to keep each file system to a max size of 500GB to make sure we could fit it all on a single tape, and to minimise restore times and impact should we experience some kind of volume
2010 Jan 19
5
ZFS/NFS/LDOM performance issues
[Cross-posting to ldoms-discuss] We are occasionally seeing massive time-to-completions for I/O requests on ZFS file systems on a Sun T5220 attached to a Sun StorageTek 2540 and a Sun J4200, and using a SSD drive as a ZIL device. Primary access to this system is via NFS, and with NFS COMMITs blocking until the request has been sent to disk, performance has been deplorable. The NFS server is a
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
2009 May 06
12
Monitoring ZFS host memory use
Hi, Please forgive me if my searching-fu has failed me in this case, but I''ve been unable to find any information on how people are going about monitoring and alerting regarding memory usage on Solaris hosts using ZFS. The problem is not that the ZFS ARC is using up the memory, but that the script Nagios is using to check memory usage simply sees, say 96% RAM used, and alerts. The
2000 Nov 30
5
jpeg in R for Windows?
I have tried to put graphs in jpeg files, but even if a file is produced, neither the graphics software nor the web browser can open such a file: "Can't read file header". Any suggestions as to what might cause this? BTW, the output would presumably be better as png files, but I don't really know if I can count on my students' web browsers being able to read this format.
2008 Apr 28
5
ZFS - Implementation Successes and Failures
Hi Firstly apologies for the spam if you got this email via multiple aliases. I''m trying to document a number of common scenarios where ZFS is used as part of the solution such as email server, $homeserver, RDBMS and so forth but taken from real implementations where things worked and equally importantly threw up things that needed to be avoided (even if that was the whole of ZFS!).