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From Varun Sharma <va...@pinterest.com>
Subject Re: Bucketized resources not working in Helix 0.6.4
Date Mon, 23 Feb 2015 22:45:29 GMT
Cool - thanks - for a pre existing resource, how can we retrieve the bucket
size - do we need to pull in the whole ideal state and then run a
getBucketSize() on it ?

On Mon, Feb 23, 2015 at 2:42 PM, Zhen Zhang <zzhang@linkedin.com> wrote:

>  bucktSize is the size of each bucket, i.e. the number of partitions each
> bucket will hold. bucket size can't be changed dynamically.
>
>  ------------------------------
> *From:* Varun Sharma [varun@pinterest.com]
> *Sent:* Monday, February 23, 2015 2:37 PM
>
> *To:* user@helix.apache.org
> *Subject:* Re: Bucketized resources not working in Helix 0.6.4
>
>   OK - thanks. Btw, is bucket size the number of buckets or is it the
> size of one bucket ? Also can the bucket size be changed dynamically using
> setResourceIdealState ?
>
> On Mon, Feb 23, 2015 at 1:53 PM, Zhen Zhang <zzhang@linkedin.com> wrote:
>
>>  Hi Varun,
>>
>>  The partition number is mainly for calculating the buckets. Partition
>> name will remain the same. You can always get and build Helix source code
>> from here:
>> https://github.com/apache/helix
>>
>>  Changing the partition naming is not hard, but we need to come up with
>> a general way to achieve this. We will think about this requirement. If you
>> have any good idea for this, you can always submit a pull request on github.
>>
>>  Thanks,
>> Jason
>>  ------------------------------
>> *From:* Varun Sharma [varun@pinterest.com]
>> *Sent:* Monday, February 23, 2015 12:04 PM
>>
>> *To:* user@helix.apache.org
>> *Subject:* Re: Bucketized resources not working in Helix 0.6.4
>>
>>    How hard is this to change to '$' - its difficult for us to now
>> change the partition names now. Is there a place to get the helix 0.6.4
>> source code, make changes and built it ?
>>
>>  Another related question - is the partition number mainly needed for
>> hashing into the buckets - the partition name would still continue to be
>> "resource_name_partition_num", right ?
>>
>> On Mon, Feb 23, 2015 at 11:52 AM, Zhen Zhang <zzhang@linkedin.com> wrote:
>>
>>>  The bucketize logic is expecting partition name following the
>>> convention {resource_name}_{partition_number}. In your case, you are using
>>> $ ?
>>>  ------------------------------
>>> *From:* Varun Sharma [varun@pinterest.com]
>>> *Sent:* Monday, February 23, 2015 11:48 AM
>>>
>>> *To:* user@helix.apache.org
>>> *Subject:* Re: Bucketized resources not working in Helix 0.6.4
>>>
>>>    Note that we had to prefix each partition with the resource name to
>>> make the partitions unique.
>>>
>>> On Mon, Feb 23, 2015 at 11:48 AM, Varun Sharma <varun@pinterest.com>
>>> wrote:
>>>
>>>> Here is the latest error I am getting:
>>>>
>>>>  2015-02-23 19:44:48,153 [controller-pool-0]
>>>> (TerrapinControllerServiceImpl.java:129) WARN  Resource creation failed for
>>>> $terrapin$data$pinpin_board_join$1424377884722, rolling back.
>>>>
>>>> *java.lang.IllegalArgumentException: Could NOT parse partition#
>>>> (join$1424377884722$0) in $terrapin$data$pinpin_board_join$1424377884722$0*
>>>>
>>>> *at
>>>> org.apache.helix.ZNRecordBucketizer.getBucketName(ZNRecordBucketizer.java:72)*
>>>>
>>>> *at
>>>> org.apache.helix.ZNRecordBucketizer.bucketize(ZNRecordBucketizer.java:105)*
>>>>
>>>> at
>>>> org.apache.helix.manager.zk.ZKHelixDataAccessor.setProperty(ZKHelixDataAccessor.java:110)
>>>>
>>>> at
>>>> org.apache.helix.manager.zk.ZKHelixAdmin.setResourceIdealState(ZKHelixAdmin.java:686)
>>>>
>>>> On Mon, Feb 23, 2015 at 10:40 AM, Zhen Zhang <zzhang@linkedin.com>
>>>> wrote:
>>>>
>>>>>  Not really. The bucketize logic just creates child znode under the
>>>>> original ideal state, and each of the child znode holds a subset of the
>>>>> total partitions.
>>>>>  ------------------------------
>>>>> *From:* Varun Sharma [varun@pinterest.com]
>>>>> *Sent:* Monday, February 23, 2015 10:37 AM
>>>>>
>>>>> *To:* user@helix.apache.org
>>>>> *Subject:* Re: Bucketized resources not working in Helix 0.6.4
>>>>>
>>>>>    One other question - would bucketizing add anything to the
>>>>> partition name - just worried about any special symbols (we use _ and
$)
>>>>> causing issues there ?
>>>>>
>>>>> On Mon, Feb 23, 2015 at 10:35 AM, Zhen Zhang <zzhang@linkedin.com>
>>>>> wrote:
>>>>>
>>>>>>  Hi Varun,
>>>>>>
>>>>>>  HelixAdmin#addResource was initially used for adding an empty
>>>>>> resource only, followed by HelixAdmin#rebalance, which bucketize
the ideal
>>>>>> state, so the bucketize logic is missing from addResource. We should
>>>>>> definitely fix this. We are also considering merging addResource
and
>>>>>> rebalance, since separating them are confusing. For now you may use
>>>>>> setResourceIdealState as a workaround.
>>>>>>
>>>>>>  Thanks,
>>>>>> Zhen
>>>>>>
>>>>>>  ------------------------------
>>>>>> *From:* Varun Sharma [varun@pinterest.com]
>>>>>> *Sent:* Monday, February 23, 2015 10:20 AM
>>>>>> *To:* user@helix.apache.org
>>>>>> *Subject:* Re: Bucketized resources not working in Helix 0.6.4
>>>>>>
>>>>>>    Thanks, Zhen.
>>>>>>
>>>>>>  What about just calling addResource with an idealState with the
>>>>>> bucket size - is that expected to not work on its own ?
>>>>>>
>>>>>>  Varun
>>>>>>
>>>>>> On Mon, Feb 23, 2015 at 10:18 AM, Zhen Zhang <zzhang@linkedin.com>
>>>>>> wrote:
>>>>>>
>>>>>>> Hi Varun,
>>>>>>>
>>>>>>> Did you do the following?
>>>>>>> HelixAdmin#addResource() // set bucket size
>>>>>>> HelixAdmin#setResourceIdealState() // no bucket size
>>>>>>>
>>>>>>> When you set the ideal state, you still need set the bucket size
in
>>>>>>> the ideal state. This value will be used to bucketize the ideal
state.
>>>>>>>
>>>>>>> Thanks,
>>>>>>> Jason
>>>>>>>
>>>>>>> ________________________________________
>>>>>>> From: Varun Sharma [varun@pinterest.com]
>>>>>>> Sent: Monday, February 23, 2015 1:51 AM
>>>>>>> To: user@helix.apache.org
>>>>>>> Subject: Bucketized resources not working in Helix 0.6.4
>>>>>>>
>>>>>>> Hi,
>>>>>>>
>>>>>>> I am trying to bucketize a resource on Helix 0.6.4 - however,
am
>>>>>>> unable to do so. I am setting the bucketSize in the idealState
and using
>>>>>>> addResource() and setResourceIdealState and it ends up complaining
that ZK
>>>>>>> size of 1M has been exceeded.
>>>>>>>
>>>>>>> I also tried using the addResource() api which creates an empty
>>>>>>> ideal state with a valid bucket size. However, when I tried to
set the
>>>>>>> ideal state on that bucket (this ideal state did not have the
bucket size
>>>>>>> set), it failed as well.
>>>>>>>
>>>>>>> Whats the right way to get bucketizing to work ?
>>>>>>>
>>>>>>> Thanks !
>>>>>>> Varun
>>>>>>>
>>>>>>
>>>>>>
>>>>>
>>>>
>>>
>>
>

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