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Re: RS, TT, shared DN and good performance on random Hbase random reads. - HBase - [mail # user]
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...Yes. What I meant was a low number of slots on these TTs alone (those that are co-located with RS, if you want to do that) by having a limited maximum of map and reduce slots configured on i...
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Author: Harsh J,
2012-08-25, 17:34
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Re: RS, TT, shared DN and good performance on random Hbase random reads. - HBase - [mail # user]
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...Hi Marc, On Sat, Aug 25, 2012 at 12:56 AM, Marc Sturlese wrote: Just to keep in mind: All HBase read/write requests are made via the RS. The RS's held blocks of HDFS data i...
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Author: Harsh J,
2012-08-25, 13:32
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Re: how client location a region/tablet? - HBase - [mail # user]
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...Lin, On Thu, Aug 23, 2012 at 10:10 PM, Lin Ma wrote: Yes, currently this is the case. We disabled multiple META regions at some point, I am unsure about why exactly but per...
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Author: Harsh J,
2012-08-23, 16:46
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Re: how client location a region/tablet? - HBase - [mail # user]
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...HBase currently keeps a single META region (Doesn't split it). ROOT holds META region location, and META has a few rows in it, a few of them for each table. See also the class MetaScanner. &...
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Author: Harsh J,
2012-08-23, 15:48
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Re: client cache for all region server information? - HBase - [mail # user]
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...Hi Lin, On Thu, Aug 23, 2012 at 7:56 PM, Lin Ma wrote: You have it correct now. Region locations are cached only if they are not available. And they are cached on need-basi...
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Author: Harsh J,
2012-08-23, 15:37
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Re: HTable batch execution order - HBase - [mail # user]
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...Hi Shagun, The original ordering index is still maintained. Yes you will have them back in order. Don't be confused by that javadoc statement. The result list is ordered in the s...
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Author: Harsh J,
2012-08-23, 14:12
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Re: client cache for all region server information? - HBase - [mail # user]
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...Hi Lin, On Thu, Aug 23, 2012 at 4:31 PM, Lin Ma wrote: What Abhishek meant here is that it caches only the needed table's rows from META. It also only caches the specific r...
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Author: Harsh J,
2012-08-23, 13:35
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Re: What happened in hlog if data are deleted cuased by ttl? - HBase - [mail # user]
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...Hey Yonghu, You are right that TTL "deletions" (it isn't exactly a delete, its more of a compact-time skip wizardry) do not go to the HLog as "events". Know that TTLs aren't applied "p...
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Author: Harsh J,
2012-08-22, 08:49
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Re: Hbase master startup error: cannot assign requested address - HBase - [mail # user]
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...Seems more of an address bind issue. What does your $ host `hostname -f` resolve to, on the master? Can you check if the IP reported back correlates with the IP assigned to your machine (Che...
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Author: Harsh J,
2012-08-19, 03:23
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Re: Put w/ timestamp -> Deleteall -> Put w/ timestamp fails - HBase - [mail # user]
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...Yonghu, You are correct at that. Until a major_compact finishes, inserting with old timestamps will never show. Inserted old timestamped values before a major compact but after a delet...
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Author: Harsh J,
2012-08-15, 12:50
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