Test description: Transfer 685 2K frames (11MB per file, 8.1 GB total) to and from LTO 4 tape. TAR Blocking Factor Write LTO4 Read LTO4 1024 2m34s 1m16s 2048 1m24s 1m16s 4096 1m19s 1m34s The organization writing the LTO4 tape can nearly halve write time by using blocking factor of 2048 rather than 1024 as…
Coolest thing I saw at SIGGRAPH 2010 was the Fusion-IO demo of streaming over 1800 DVD quality videos simultaneously from a 0.5 TB Fusion-IO drive. Here is a video of that demo: Quick 1:29 video of the demo explaining how the display works. This second link is a little old so the stats on the…
Finally got my own blog up: http://verticalsysadmin.com/blog/ It’ll be about configuration management, documentation, and increasing system administration efficiency.
My report from USENIX 2010 Configuration Management Summit is at http://www.linux-mag.com/id/7841
SIGGGRAPH 2010 Trip Report of Cool Things Aleksey Saw in the Exhibition Hall (Coolest stuff at the top.) – FusionIO had the coolest demo!! 1500 DVD-quality videos streaming from a single Fusion IO (RAM-based) 640 GB drive displayed onto a large virtual screen (composed of 16 – that’s 4×4 large displayes). all 1500 videos were…
My results transferring 685 2K frames (11MB per file, 8.1 GB total) using GNU tar to/from LTO4 tape GNU tar Blocking Factor Write LTO4 Read LTO4 1024 2m34s 1m16s 2048 1m24s 1m16s 4096 1m19s 1m34s
Problem: Sufficiently long regular expressions start to look like line noise and become unmaintainable Solution: Use perl regular expressions with the /x modifier perlre manpage reads: /x Extend your pattern’s legibility by permitting whitespace and comments. These are usually written as “the /x modifier”… The /x modifier itself needs a little more explanation. It tells…
Going to SCALE 8x today – I’ll be in the LOPSA booth, PostgreSQL booth and doing FOSS tours. Do I know how to overcommit or what?
If you have multiple vias in your rsync path (e.g. a -> b -> c) you can use an rsync filter rule to tell rsync: don’t transfer files that have . in the beginning of the filename! –filter ‘- .*’ This way you won’t have rsync temp files (named something like .filename.xxyyzz) from the a…
http://sysadvent.blogspot.com/