Re: Need some information over WAL

2014-02-25 Thread Ted Yu
over WAL files and eventually delete them when they > are no longer needed. > > Regards, > Dhaval > > > > From: Upendra Yadav > To: user@hbase.apache.org; Dhaval Shah > Sent: Tuesday, 25 February 2014 1:18 PM > Subject: Re: Need som

Re: Need some information over WAL

2014-02-25 Thread Upendra Yadav
Regards, > Dhaval > > > > From: Upendra Yadav > To: user@hbase.apache.org; Dhaval Shah > Sent: Tuesday, 25 February 2014 1:18 PM > Subject: Re: Need some information over WAL > > > Thanks Dhawal > > Oh... whatever i assumed with reading

Re: Need some information over WAL

2014-02-25 Thread Dhaval Shah
Sent: Tuesday, 25 February 2014 1:18 PM Subject: Re: Need some information over WAL Thanks Dhawal Oh... whatever i assumed with reading documents (partially) that was wrong... With ur answer... i have another questions... WAL is a single and common file for all region of a Region server

Re: Need some information over WAL

2014-02-25 Thread Upendra Yadav
Shah > wrote: > > > Inline > > > > Regards, > > Dhaval > > > > > > > > From: Upendra Yadav > > To: user@hbase.apache.org > > Sent: Tuesday, 25 February 2014 1:00 PM > > Subject: Need some i

Re: Need some information over WAL

2014-02-25 Thread Upendra Yadav
ser@hbase.apache.org > Sent: Tuesday, 25 February 2014 1:00 PM > Subject: Need some information over WAL > > > I have also doubt over WAL(write ahead log). > > In hdfs we can write a new file or we can append to old file. > > Is that correct : > 1. WAL only logs operatio

Re: Need some information over WAL

2014-02-25 Thread Ted Yu
gt; From: Upendra Yadav > To: user@hbase.apache.org > Sent: Tuesday, 25 February 2014 1:00 PM > Subject: Need some information over WAL > > > I have also doubt over WAL(write ahead log). > > In hdfs we can write a new file or we can append to old file. > > Is that correc

Re: Need some information over WAL

2014-02-25 Thread Dhaval Shah
Inline   Regards, Dhaval From: Upendra Yadav To: user@hbase.apache.org Sent: Tuesday, 25 February 2014 1:00 PM Subject: Need some information over WAL I have also doubt over WAL(write ahead log). In hdfs we can write a new file or we can append to old file

Need some information over WAL

2014-02-25 Thread Upendra Yadav
I have also doubt over WAL(write ahead log). In hdfs we can write a new file or we can append to old file. Is that correct : 1. WAL only logs operations not its data... just like disk journaling(ext4) 2. In case of Region Server failure... WAL replay will depends on Client to get each operation'