14%
17.12.2014
need a simple tool to help you understand what’s happening on the nodes.
... performance from many perspectives (i.e., CPU, network, disk). The tool is called nmon
.
Nmon Overview
Nmon is short for “Nigel’s Monitor” and is a command-line tool that presents performance information ... need a simple tool to help you understand what’s happening on the nodes.
14%
20.02.2012
.51, 0, 0.36, 17.74, 0.00, 6.38, 90, 0
2012-01-09 21:10:00, 92, 4.42, 0, 0.35, 20.81, 0.00, 7.22, 100, 0
2012-01-09 21:12
14%
30.01.2020
: 1 (f=1): [w(1)][100.0%][r=0KiB/s,w=1401KiB/s][r=0,w=350 IOPS][eta 00m:00s]
test: (groupid=0, jobs=1): err= 0: pid=3104: Sat Oct 12 14:39:08 2019
write: IOPS=352, BW=1410KiB/s (1444kB/s)(82.8Mi
14%
07.10.2014
Sheepdog Server in Action
# ps -ef|egrep '([c]orosyn|[s]heep)'
root 491 1 0 13:04 ? 00:00:30 corosync
root 581 1 0 1:13 PM ? 00:00:03 sheep -p 7000 /var
14%
19.11.2019
Jobs: 1 (f=1): [w(1)][100.0%][w=654MiB/s][w=167k IOPS][eta 00m:00s]
test: (groupid=0, jobs=1): err= 0: pid=1225: Sat Oct 12 19:20:18 2019
write: IOPS=168k, BW=655MiB/s (687MB/s)(10.0GiB/15634msec); 0
14%
30.11.2025
_dlm]
root 3467 7 0 20:07 ? 00:00:00 [o2net]
root 3965 7 0 20:24 ? 00:00:00 [ocfs2_wq]
root 7921 7 0 22:40 ? 00:00:00 [o2hb-BD5A574EC8]
root 7935 7
14%
13.12.2018
(USB 2), and a Samsung Fit Plus 32 (USB 3).
Disk Caches
The OS is not the only player in the caching business. Examining a Samsung 750 SATA SSD drive, you cannot but notice a 256MB RAM buffer [8
14%
17.02.2015
B+ has the following basic characteristics:
Broadcom BCM2835 system on a chip (SoC)
Single-core ARM1176JZF-S processor (32-bit processor) at 700MHz
Broadcom VideoCore IV GPU
512MB
14%
12.02.2014
for the sake of brevity).
Listing 5: User Information from ps_mem
[root@home4 1]# ./ps_mem.py -p $(pgrep -u laytonjb | paste -d, -s)
Private + Shared = RAM used Program
84.0 KiB + 12.5 Ki
13%
04.11.2011
ACCEPT
-A RH-Firewall-1-INPUT -p tcp --dport 22 --syn -s 192.168.1.0/255.255.255.0 -j ACCEPT
-A RH-Firewall-1-INPUT -p tcp --dport 22 --syn -m limit --limit 6/m --limit-burst 5 -j ACCEPT
### end ssh
