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From "Mike Drob (JIRA)" <>
Subject [jira] [Created] (ACCUMULO-4407) Use zk chroot instead of instance id
Date Tue, 16 Aug 2016 16:09:21 GMT
Mike Drob created ACCUMULO-4407:

             Summary: Use zk chroot instead of instance id
                 Key: ACCUMULO-4407
             Project: Accumulo
          Issue Type: Improvement
          Components: core, zookeeper
            Reporter: Mike Drob
             Fix For: 2.0.0

This is something I'd like to see considered for Accumulo 2.0. Probably can't move on it any
sooner because it would break a lot of assumptions, but might be possible to make work in
a backwards compatible way.

Currently we use instance id in zookeeper to allow for multiple installations sharing the
same zk quorum. This is both a confusing amount of indirection and a headache for operators
when they need to intervene because a uuid is not very human-memory friendly.

Instead, if we specify a chroot path then we can assume the given accumulo instance is the
only one we will see. This will simplify a lot of APIs because in essence we will be combining
the zk and instance id arguments into one thing.

I suspect that either we were not aware of zk chroot or it did not exist when we started,
hence not using it. But there's not really any good excuses left today to avoid it.

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