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HBase, mail # user - Region splitting problem


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RE: Region splitting problem
Ramkrishna.S.Vasudevan 2012-06-28, 08:33
Hi

What type of rowkeys are you specifying?  HBase does Byte comparison.

So the split that happens is correct.

"1012" and "10112" will fall in the same region whereas "201" will come in
the next region.

It depends on how you form the row key.
Regards
Ram

> -----Original Message-----
> From: Ben Kim [mailto:[EMAIL PROTECTED]]
> Sent: Thursday, June 28, 2012 12:38 PM
> To: [EMAIL PROTECTED]
> Subject: Region splitting problem
>
> Hi :)
>
> I have a hbase table with rowkeys "1" ~ "10000000" with non-meaningful
> cells (each row has one cell that's about 10KB)
> I figured that all data was in one region, so I ran a command to split
> row
> at "1000000"
> then, hbase automatically started splitting the regions which should
> have
> happened before.(this is ok with me )
>
> bigger problem is that for some regions start key is larger than end
> key.
> following is the region info after all auto-split and the hbase became
> steady.
> if you look at the 4th region and 2nd to the last, start key is lareger
> than the endkey.
> How is this possible?
>
> NameRegion ServerStart KeyEnd KeyRequests
> testtable,,1340843246470.03a98c01a47d448966e299112915c021. hbase-
> 20:60030
> 10000000 0
> testtable,10000000,1340847028444.d85e18bb7597d8bde91b2819b45a1020.
> hbase-20:60030
> 10000000 15624273 0
> testtable,15624273,1340847028444.2b3ec263d7810f883b3c0087f059ff15.
> hbase-20:60030
> 15624273 21249208 0
> testtable,21249208,1340846924325.e137e808cb7a4d3e52298f17cc5ae1b9.
> hbase-20:60030
> 21249208 2687348 0
> testtable,2687348,1340846924325.fc012ac943efd484e4bbe4bacc81c51a.
> hbase-20:60030
> 2687348 3249908 0
> testtable,3249908,1340846817015.0aeddf5bf1cdb073c9b2a0ace5bd709f.
> hbase-20:60030
> 3249908 3812335 0
> testtable,3812335,1340846817015.142b3619706dbb36d0338b2a587fd719.
> hbase-20:60030
> 3812335 43748950 0
> testtable,43748950,1340846705466.dd18534fabb5b06ec345424d4b174176.
> hbase-20:60030
> 43748950 49373886 0
> testtable,49373886,1340846705466.db6abcdeb0525c02b5def7fde147fd76.
> hbase-20:60030
> 49373886 54999486 0
> testtable,54999486,1340846592668.1907f5f6d601720d429f7cac824a82cb.
> hbase-20:60030
> 54999486 60623755 0
> testtable,60623755,1340846592668.1ee94c1f78e7e4dd661d5db4a55d49ed.
> hbase-20:60030
> 60623755 66248691 0
> testtable,66248691,1340846484950.6651e3964a3d55f39f36cd268af666a5.
> hbase-20:60030
> 66248691 71873625 0
> testtable,71873625,1340846484950.3a7e621d9c866a4e85816de36c18a6e2.
> hbase-20:60030
> 71873625 77499226 0
> testtable,77499226,1340846372518.1ce1f0cb47004bac1f3812e768be7749.
> hbase-20:60030
> 77499226 83123496 0
> testtable,83123496,1340846372518.0e76f8ff58b3c3a6c87c6e8116213fa6.
> hbase-20:60030
> 83123496 88749097 0
> testtable,88749097,1340846264242.fbfb1ecd4dc57d8a77c2457cd91c64c5.
> hbase-20:60030
> 88749097 9437403 0
> testtable,9437403,1340846264242.b92bf9b988416b1cb55bdf297654c2a5.
> hbase-20:60030
> 9437403
> 0
>
> *Benjamin Kim*
> *benkimkimben at gmail*