Re:[jira] [Updated] (HBASE-15529) Override needBalance in StochasticLoadBalancer

are there any plan to backport this Improvement to 0.98.X since if StochasticLoadBalancer does not override mehtod "needBalance", the power of StochasticLoadBalancer will be reduced grately At 2016-05-22 12:08:12, "Ted Yu (JIRA)" wrote: > > [ >

how to make a safe use of hbase

in hbase, if we know zookeeper address, we can write and read hbase if we know hmaster's address, we can see 60010 page how can we make a safe use of hbase such as, if we want to see 60010, to write/read hbase, we must have the correct password, like linux

Re:hbaseAdmin tableExists create catalogTracker for every call

At 2016-04-19 21:09:42, "WangYQ" <wangyongqiang0...@163.com> wrote: in hbase 0.98.10, class "HBaseAdmin " line 303, method "tableExists", will create a catalogTracker for every call we can let a HBaseAdmin object use one CatalogTracker object, to reduce the object create, connect zk and so on

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hbase 0.98.10 in class hmaster line 1298, the threadpool size for master_table_operation is 1, can not be set are there any problems if i disable tables in concurrently thanks

hbaseAdmin tableExists create catalogTracker for every call

in hbase 0.98.10, class "HBaseAdmin " line 303, method "tableExists", will create a catalogTracker for every call we can let a HBaseAdmin object use one CatalogTracker object, to reduce the object create, connect zk and so on

a problem in split cause split timeout

in hbase 0.98.10, class SplitTransition, line 403, we close parent region to get hfiles to split, returns a map, which size is the CF number of the table after that, in line 433, we split hfiles, we want to create a threadPool which size is the number of HFiles, but in fact, in line 822, we

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why we can not modify hbase:meta such as reduce veriosn from 10 to 3

in some case class StoreScanner can noly do seekScanner in serial

version : hbase 0.98.10 class: storeScanner method: seekScanners(line 314 to 334) if we add columns to scan, then parameter "isLazy" will be false so we can only do seek in serial, not parallel

add thread number conf to tool upgradeTo96

when upgrade from 94 to 98, we can use class upgradeTo96 this tool support check and upgrade tool check tool is class hfileV1 Detector, and support -n to set thrednumber but, class upgradeTo96 filter this parameter