>> and one more thing how can it be possible to read from one osd and
>> then simultaneous write to direct on other osd with less/no traffic?
>
> I'm not sure I understand the question...
Scenario :
I have written file X.txt on some osd which is primary for filr
X.txt ( direct write operation using rados cmd) .
Now while read on file X.txt is in progress, Can I make sure
the simultaneous write request must be directed to other osd using
crushmaps/other way?
Goal of task :
Trying to avoid read - write clashes as much as possible to
achieve faster operations (I/O) . Although CRUSH selects osd for data
placement based on pseudo random function. is it possible ?
-
Hemant Surale.
On Tue, Nov 20, 2012 at 10:15 PM, Sage Weil <sage@xxxxxxxxxxx> wrote:
> On Tue, 20 Nov 2012, hemant surale wrote:
>> Hi Community,
>> I have question about port number used by ceph-osd daemon . I
>> observed traffic (inter -osd communication while data ingest happened)
>> on port 6802 and then after some time when I ingested second file
>> after some delay port no 6804 was used . Is there any specific reason
>> to change port no here?
>
> The ports are dynamic. Daemons bind to a random (6800-6900) port on
> startup and communicate on that. They discover each other via the
> addresses published in the osdmap when the daemon starts.
>
>> and one more thing how can it be possible to read from one osd and
>> then simultaneous write to direct on other osd with less/no traffic?
>
> I'm not sure I understand the question...
>
> sage
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