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33%
Fundamentals of I/O benchmarking
11.04.2016
Home »  Archive  »  2016  »  Issue 32: Measu...  » 
Lead Image © Kheng Ho Toh, 123RF.com
(512 MB) copied, 49.1424 s, 10.4 MB/s If you want to empty the read and write cache for benchmark purposes, you can do so using: sync; echo 3 > /proc/sys/vm/drop_caches Sequential access
33%
Visualizing containers with clarity
29.09.2020
Home »  Archive  »  2020  »  Issue 59: Custo...  » 
Lead Image © Ulrich Müller, 123RF.com
-line operations. To install Dockly [3], you can choose one of two routes: with npm (see the "Installation by npm" box for that route) and in a Docker container. For context, on my laptop, about 43MB of file space
33%
Rethinking RAID (on Linux)
16.03.2021
Home »  HPC  »  Articles  » 
, ioengine=libaio, iodepth=32 fio-3.12 Starting 1 process Jobs: 1 (f=1) test: (groupid=0, jobs=1): err= 0: pid=5872: Sat Jan  9 16:35:08 2021   read: IOPS=251k, BW=979MiB/s (1026MB/s)(2045MiB/2089msec
32%
S3QL filesystem for cloud backups
09.01.2013
Home »  Archive  »  2013  »  Issue 18: New W...  » 
Lead Image © stylephotographs, 123RF.com
a 256-bit AES key. An additional SHA-256 HMAC checksum protects the data from manipulation. Compression: S3QL compresses the data before storing, using either LZMA, bzip2, or gzip. This compression ... advantages: S3QL. ... S3QL filesystem for cloud backups
32%
A Btrfs field test and workshop
31.10.2025
Home »  Archive  »  2012  »  Issue 11: Cloud...  » 
© Adrian Hillman, 123RF.com
(depending on the RAID level). These chunks are usually 1GB for data and 256MB for metadata. One exception is the first metadata chunk, which mkfs.btrfs creates 1GB in size, assuming there is enough space
32%
Rethinking RAID (on Linux)
25.03.2021
Home »  Archive  »  2021  »  Issue 62: Lean...  » 
Lead Image © nikkikii, 123RF.com
, ioengine=libaio, iodepth=32 fio-3.12 Starting 1 process Jobs: 1 (f=1) test: (groupid=0, jobs=1): err= 0: pid=5956: Sat Jan 9 16:38:53 2021 read: IOPS=256k, BW=998MiB/s (1047MB/s)(2045MiB/2049msec
31%
Network backups with Amanda
05.12.2016
Home »  Archive  »  2016  »  Issue 36: Autom...  » 
Lead Image © Tommaso Lizzul, 123RF.com
/state/log" 05 dumpuser "amanda" 06 labelstr "MyData[0-9][0-9]" 07 autolabel "MyData%%" EMPTY VOLUME_ERROR 08 tpchanger "chg-disk:/amanda/vtapes" 09 tapecycle 4 10 dumpcycle 3 days 11 amrecover_changer "changer
31%
Tuning I/O Patterns in Fortran 90
04.12.2013
Home »  HPC  »  Articles  » 
the examples in this series because the I/O is so small; however, my focus is not really on the throughput itself, but on the I/O pattern.) The strace output in Figure 3F is for 500 iterations
31%
Using the MQTT IoT protocol for unusual but useful purposes
03.12.2015
Home »  Archive  »  2015  »  Issue 30: OpenD...  » 
Lead Image © Heiko Küverling, 123RF.com
. Clients don't actually know whether they really see all the messages that arrive at the broker; the broker ACLS decide this. Messages transport payloads; payload data can also be binary and be up to 256MB
31%
Building a virtual NVMe drive
25.03.2020
Home »  Archive  »  2020  »  Issue 56: Secur...  » 
Lead Image © lassedesignen, 123RF
7 1 56008 loop1 06 7 2 56184 loop2 07 7 3 91264 loop3 08 259 0 244198584 nvme0n1 09 8 0 488386584 sda 10 8 1 1024 sda1 11

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