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From "Andrew Purtell (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-6193) REST Api for HBase administrative tasks
Date Sat, 09 Jun 2012 16:50:42 GMT

    [ https://issues.apache.org/jira/browse/HBASE-6193?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13292382#comment-13292382
] 

Andrew Purtell commented on HBASE-6193:
---------------------------------------

bq. REST api gateway may be difficult to secure the system. The proxy approach requires two
security implementations for outward facing security and internal security implementation.
Where the embedded rest api server in region server would ensure only one security implementation
is required.

The counter argument is you should never let untrusted access onto the cluster directly. This
is why I dislike HTTPFS and prefer instead the design of Hoop. The gateway provides an effective
security perimeter. Because it is RESTful, security can be layered on top of the HTTP transactions
as the system integrator desires via the many options for doing so developed over the years
for web servers.

bq. In addition, rest proxy increases the latency for HBase response time by one hop.

The counter argument is REST endpoints built into the RegionServers add the overheads of HTTP
processing. And we have to build this new thing into the master that issues HTTP redirects?


bq. If the rest gateway is busy serving scan query and become none responsive

An advantage of the gateway approach is you can scale it independent of the RegionServer tier.
So if it's slow, add more workers. Use a proxy that supports sticky sessions to preserve scanner
semantics.



                
> REST Api for HBase administrative tasks
> ---------------------------------------
>
>                 Key: HBASE-6193
>                 URL: https://issues.apache.org/jira/browse/HBASE-6193
>             Project: HBase
>          Issue Type: New Feature
>            Reporter: Eric Yang
>
> For enabling HBASE-4368, it may be useful to have embedded REST API server for each region
server, and HBase Master can either aggregate or proxy/redirect REST API base on administrative
task functions.
> The popular admin task that can take advantage of this setup are:
> - Trigger table compaction
> - Show process list
> - Health check
> - Show black listed servers

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