Differences

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--- benchmarking [2016/03/15 09:38] – [Syntax and basic options] admin
+++ benchmarking [2022/10/29 16:15] (current) – external edit 127.0.0.1
@@ Line 10: / Line 10: @@
     * -n requests     Number of requests to perform
     * -c concurrency  Number of multiple requests to make
-===== Benchmark File System Read Write Performance =====
-refer: http://www.slashroot.in/linux-file-system-read-write-performance-test
 === examples ===
   * run benchmark website shop.babies.vn with 100 requests and 4 concurrency multiple requests:<code bash>
@@ Line 185: / Line 184: @@
   - Step2: Run test<code bash>
 speedtest
+</code>
+==== network monitor with iptraf ====
+refer: http://www.tecmint.com/real-time-interactive-ip-lan-monitoring-with-iptraf-tool/
+  * Install <code bash>
+yum install iptraf
+</code>
+  * Run normal<code bash>
+iptraf
+</code>
+  * Monitor Traffic on eth0:<code bash>
+iptraf -s eth0
+</code>
+===== Benchmark File System Read Write Performance =====
+refer: http://www.slashroot.in/linux-file-system-read-write-performance-test
+==== Using dd command ====
+  * Benchmarck the speed with which **data was cached to RAM memory, not to the disk**<code bash>
+dd if=/dev/zero of=speetest bs=1M count=100
+</code>output:<code>
++0 records in
++0 records out
+104857600 bytes (105 MB) copied, 0.102163 s, 1.0 GB/s
+</code>
+  * Ask dd command to report the speed only **after the data is synced with the disk**<code bash>
+dd if=/dev/zero of=speetest bs=1M count=100 conv=fdatasync
+</code>output:<code>
++0 records in
++0 records out
+104857600 bytes (105 MB) copied, 1.12073 s, 93.6 MB/s
+</code>
+==== Using hdparm ====
+<code bash>
+hdparm -tT /dev/sdb1
+</code>output:<code>
+/dev/sdb1:
+ Timing cached reads:   12982 MB in  2.00 seconds = 6500.84 MB/sec
+ Timing buffered disk reads: 346 MB in  3.01 seconds = 115.04 MB/sec
 </code>