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17%
Collecting and evaluating performance data over a period of time
20.03.2014
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»
Archive
»
2014
»
Issue 19: Perim...
»
jcb@hercules:# sar -u -f /var/log/sysstat/sa02 -s 12:
00:00
-e 13:
00:00
Linux
3
.5.0-43-generic (hercules) 02.12.2013 _x86_64_ (2 CPU) 12:05:01 CPU %user %nice %system
17%
Rethinking RAID (on Linux)
25.03.2021
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2021
»
Issue 62: Lean...
»
=libaio, iodepth=32 fio-
3
.12 Starting 1 process Jobs: 1 (f=1): [w(1)][100.0%][w=1420KiB/s][w=355 IOPS][eta
00
m:
00
s] test: (groupid=0, jobs=1): err= 0: pid=3377: Sat Jan 9 15:31:04 2021 write: IOPS=352, BW=1410Ki
17%
Profiling Python code
30.01.2020
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2020
»
Issue 55: AWS L...
»
%|
3
| 2|
3
.50475e-05| 1.75238e-05| 0.
00
%|import platform 4| 1| 2.19345e-05| 2.19345e-05| 0.
00
%|from time import clock (call)| 1| 2.67029e-05| 2.67029e-05| 0.
00
17%
Processor and Memory Metrics
12.02.2014
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.py CPU ALL: 1.0 % CPU0 4.1% CPU1 2.0% CPU2 0.0% CPU
3
0.0% CPU4 0.0% CPU5 0.0% CPU6 0.0% CPU7 2.0% CPU ALL: user: 0.7% nice:
0.0
% system: 0.2% idle
16%
Greylisting with Postgrey
22.06.2012
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: Qmail Delivery Retry Events Delivery Attempt Seconds D-HH:MM:SS 1 0 0-
00:00:00
2 400 0-
00
:06:40
3
1600 0-
00
:26:40 4
16%
HPC Cloud Storage
20.11.2013
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advantages: S
3
QL. ... 16384 Nov 10 10:
00
lost+found 4 drwxr-xr-x.
3
root root 4096 Nov 10 10:
00
.. 4 -rw-r--r-- 1 root root 294 Nov 10 10:07 s
3
ql_passphrase 4 -rw-r--r-- 1 root root 243 Nov 10 10:07 s
3
ql_seq_no_1 4 -rw ... advantages: S
3
QL. ... S
3
QL Filesystem for HPC Storage
16%
Understanding the Status of Your Filesystem
18.06.2014
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( 0.08%) ( 99.93% cumulative) [2920-3650 days]: 136 ( 0.04%) ( 99.97% cumulative) [3650-4380 days]:
3 ( 0.00
%) ( 99.97% cumulative) [4380-5110 days]: 122 ( 0.03%) (100.
00
% cumulative) [5110
16%
Pen Testing with netcat
14.05.2013
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the net start command to get a list of services running (Figure
3
): >net start Figure
3
: Output from the net start command. Several services
16%
Speed up your MySQL database
11.02.2016
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2016
»
Issue 31: Tunin...
»
.40 <- < 71% idle > 0 1.
00
0.
00
0.37 0.
00
0.
00
0.06 0.
00
0.
00
0.
00
98.57 1 100.
00
0.
00
0.
00
0.
00
0.
00
0.
00
0.
00
0.
00
0.
00
0.
00
2
3
.77 0.
00
16%
S3QL filesystem for cloud backups
09.01.2013
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2013
»
Issue 18: New W...
»
metadata... 18 Wrote 0.
00
MiB of compressed metadata. After creating an S
3
QL filesystem, I checked the mountpoint, /mnt/data1 (Listing 2). A few files are created as a result of the S
3
QL filesystem ... advantages: S
3
QL. ... S
3
QL filesystem for cloud backups
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