(r2) CephTool < ORUA

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***script1***

*makecephconfig* is a simple script allowing you to create the *ceph.conf* in a way easy to test multiple hosts and OSDs.

   * Allows you to easily change the conf to test 3osds running on 1node (total 3 disks/osds), and then test 3node with 1osd (total 3 disks/osds).
   * Allows you to make many osd/node setups.
   * This script is to speed up the benchmarks for different node configurations.

   * Note that this only changes the OSD at this stage, you can modify the script to handle multiple MDS/MON the similar way.
   * You need to have an initial ceph.xxx (where xxx is your preferred configuration (and used as the osd's *hostname*), in our example it is ceph.ss, so multiple hosts will be *ss1*, *ss2*, *ss3*...)
   * You need to make sure the underlying */dev/sdX* is correctly configured (formatted and mounted), or else Ceph won't obviously find them.

For instance, type:

<verbatim>
./makecephconfig ss 3 1
</verbatim>

This will make a new ceph.conf from loading ceph. *ss*, 3 nodes and 1 osd each (total 3 osds)

<pre>./makecephconfig ss 3 3</pre>produces 3 hosts and 3 osds each (total 9 osds)

<pre>./makecephconfig ss 6 2</pre>produces 6 hosts and 2 osds each (total 12 osds)

<pre>./makecephconfig ss 2 6</pre>produces 2 hosts and 6 osds each (total 12 osds)

The last example will produce the following

<verbatim>
[osd.0]
        host = ss1
        osd data = /data/osd.11
        osd journal = /data/osd.11/journal
[osd.1]
        host = ss1
        osd data = /data/osd.12
        osd journal = /data/osd.12/journal
[osd.2]
        host = ss1
        osd data = /data/osd.13
        osd journal = /data/osd.13/journal
[osd.3]
        host = ss1
        osd data = /data/osd.14
        osd journal = /data/osd.14/journal
[osd.4]
        host = ss1
        osd data = /data/osd.15
        osd journal = /data/osd.15/journal
[osd.5]
        host = ss1
        osd data = /data/osd.16
        osd journal = /data/osd.16/journal
[osd.6]
        host = ss2
        osd data = /data/osd.21
        osd journal = /data/osd.21/journal
[osd.7]
        host = ss2
        osd data = /data/osd.22
        osd journal = /data/osd.22/journal
[osd.8]
        host = ss2
        osd data = /data/osd.23
        osd journal = /data/osd.23/journal
[osd.9]
        host = ss2
        osd data = /data/osd.24
        osd journal = /data/osd.24/journal
[osd.10]
        host = ss2
        osd data = /data/osd.25
        osd journal = /data/osd.25/journal
[osd.11]
        host = ss2
        osd data = /data/osd.26
        osd journal = /data/osd.26/journal
</verbatim>

Notice the order, it will always start osd.0 with ss1, after it reaches the osd.5 (6 osds), it will be ss2.

***script2***