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Posted to commits@cassandra.apache.org by "Gregory Ramsperger (JIRA)" <ji...@apache.org> on 2014/08/27 18:03:58 UTC
[jira] [Updated] (CASSANDRA-7839) Support standard EC2 naming
conventions in Ec2Snitch
[ https://issues.apache.org/jira/browse/CASSANDRA-7839?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Gregory Ramsperger updated CASSANDRA-7839:
------------------------------------------
Description:
The EC2 snitches use datacenter and rack naming conventions inconsistent with those presented in Amazon EC2 APIs as region and availability zone. A discussion of this is found in CASSANDRA-4026. This has not been changed for valid backwards compatibility reasons. Using SnitchProperties, it is possible to switch between the legacy naming and the full, AWS-style naming.
Proposal:
* introduce a property (ec2_naming_scheme) to switch naming schemes.
* default to current/legacy naming scheme
* add support for a new scheme ("full") which is consistent AWS conventions
** data centers will be the region name, including the number
** racks will be the availability zone name, including the region name
Examples:
* * legacy* : datacenter is the part of the availability zone name preceding the last "\-" when the zone ends in \-1 and includes the number if not \-1. Rack is the portion of the availability zone name following the last "\-".
** us-west-1a => dc: us-west, rack: 1a
** us-west-2b => dc: us-west-2, rack: 2b;
* *full* : datacenter is the part of the availability zone name preceding zone letter. rack is the entire availability zone name.
** us-west-1a => dc: us-west-1, rack: us-west-1a
** us-west-2b => dc: us-west-2, rack: us-west-2b;
was:
The EC2 snitches use datacenter and rack naming conventions inconsistent with those presented in Amazon EC2 APIs as region and availability zone. A discussion of this is found in CASSANDRA-4026. This has not been changed for valid backwards compatibility reasons. Using SnitchProperties, it is possible to switch between the legacy naming and the full, AWS-style naming.
Proposal:
* introduce a property (ec2_naming_scheme) to switch naming schemes.
* default to current/legacy naming scheme
* add support for a new scheme ("full") which is consistent AWS conventions
** data centers will be the region name, including the number
** racks will be the availability zone name, including the region name
Examples:
* * legacy* : datacenter is the part of the availability zone name preceding the last "-" when the zone ends in -1 and includes the number if not -1. Rack is the portion of the availability zone name following the last "-".
** us-west-1a => dc: us-west, rack: 1a
** us-west-2b => dc: us-west-2, rack: 2b;
* *full* : datacenter is the part of the availability zone name preceding zone letter. rack is the entire availability zone name.
** us-west-1a => dc: us-west-1, rack: us-west-1a
** us-west-2b => dc: us-west-2, rack: us-west-2b;
> Support standard EC2 naming conventions in Ec2Snitch
> ----------------------------------------------------
>
> Key: CASSANDRA-7839
> URL: https://issues.apache.org/jira/browse/CASSANDRA-7839
> Project: Cassandra
> Issue Type: Improvement
> Components: Core
> Reporter: Gregory Ramsperger
> Attachments: conditionally-use-full-Amazon-style-naming-for-dc.patch
>
>
> The EC2 snitches use datacenter and rack naming conventions inconsistent with those presented in Amazon EC2 APIs as region and availability zone. A discussion of this is found in CASSANDRA-4026. This has not been changed for valid backwards compatibility reasons. Using SnitchProperties, it is possible to switch between the legacy naming and the full, AWS-style naming.
> Proposal:
> * introduce a property (ec2_naming_scheme) to switch naming schemes.
> * default to current/legacy naming scheme
> * add support for a new scheme ("full") which is consistent AWS conventions
> ** data centers will be the region name, including the number
> ** racks will be the availability zone name, including the region name
> Examples:
> * * legacy* : datacenter is the part of the availability zone name preceding the last "\-" when the zone ends in \-1 and includes the number if not \-1. Rack is the portion of the availability zone name following the last "\-".
> ** us-west-1a => dc: us-west, rack: 1a
> ** us-west-2b => dc: us-west-2, rack: 2b;
> * *full* : datacenter is the part of the availability zone name preceding zone letter. rack is the entire availability zone name.
> ** us-west-1a => dc: us-west-1, rack: us-west-1a
> ** us-west-2b => dc: us-west-2, rack: us-west-2b;
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