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https://issues.apache.org/jira/browse/CASSANDRA-1654?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12925525#action_12925525
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Jon Hermes edited comment on CASSANDRA-1654 at 10/27/10 4:26 PM:
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$ bin/cassandra -f
...
INFO 19:42:51,530 DiskAccessMode 'auto' determined to be mmap, indexAccessMode
is mmap
*INFO 19:42:51,558 EC2Snitch using region: us-east, zone: 1c.*
INFO 19:42:51,623 Creating new commitlog segment
/var/lib/cassandra/commitlog/CommitLog-1288208571623.log
...
\o/
If 169.254.169.254 doesn't exist, then there will be a "No Route to Host"
error. If the response code isn't 200 OK, then it flubs. If for some reason it
does return a response, the region/zone parsing logic will most likely fail.
But if they run on ec2, It Just Works (tm).
was (Author: jhermes):
$ bin/cassandra -f
...
INFO 19:42:51,530 DiskAccessMode 'auto' determined to be mmap, indexAccessMode
is mmap
*INFO 19:42:51,558 EC2Snitch using region: us-east, zone: 1c.*
INFO 19:42:51,623 Creating new commitlog segment
/var/lib/cassandra/commitlog/CommitLog-1288208571623.log
...
\o/
If the response code isn't 200 OK, then it flubs. If for some reason it does
return a response, the region/zone parsing logic will most likely fail. But if
they run on ec2, It Just Works (tm).
> EC2Snitch
> ---------
>
> Key: CASSANDRA-1654
> URL: https://issues.apache.org/jira/browse/CASSANDRA-1654
> Project: Cassandra
> Issue Type: New Feature
> Components: Core
> Reporter: Jonathan Ellis
> Assignee: Jon Hermes
> Fix For: 0.7.1
>
> Attachments: 1654.txt
>
>
> This will be a snitch extending AbstractNetworkTopologySnitch that pulls DC
> from instance metadata placement_availability_zone.
> I don't think we can get rack information so the choice is between picking
> something unique-per-machine to be the rack or assigning everything in the DC
> the same rack. Second seems easier, so let's use placement_availability_zone
> for rack, too.
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