>From HRegion.java: "Appends performed are done under row lock but reads do not take locks out so this can be seen partially complete by gets and scans."
Appends are partially atomic (you can get partial reads but you will never get corrupted writes) and they are implemented on the server side. Best regards, Vladimir Rodionov Principal Platform Engineer Carrier IQ, www.carrieriq.com e-mail: vrodio...@carrieriq.com ________________________________________ From: GSK Chaitanya [gskchaitany...@gmail.com] Sent: Monday, April 14, 2014 10:05 AM To: user@hbase.apache.org; d...@hbase.apache.org Subject: HBase atomic append functionality (not just client) Mighty Hbase users and developers, I have few questions and I'd really appreciate it if someone can clarify them. 1) I want to know if Hbase inherently supports *atomic append*functionality like *get* and *put*. For my work, I would be using OpenTSDB which is a layer on top of AsynchHBase and AsynchHBase doesnt work with HBase client (which supports *atomic append*). 2) If I understand correctly, atomic append of HBase client internally does a get and put instead of actually appending to the end of the cell. If that's the case, I wonder how does this functionality is of much use in terms of performance. In our case, we would like a very light weight append functionality. I'd like to know if there are any plans of adding this feature to HBase main in the near future. Thanks, Chaitanya Confidentiality Notice: The information contained in this message, including any attachments hereto, may be confidential and is intended to be read only by the individual or entity to whom this message is addressed. If the reader of this message is not the intended recipient or an agent or designee of the intended recipient, please note that any review, use, disclosure or distribution of this message or its attachments, in any form, is strictly prohibited. If you have received this message in error, please immediately notify the sender and/or notificati...@carrieriq.com and delete or destroy any copy of this message and its attachments.
