Shulou(Shulou.com)05/31 Report--

This article will explain in detail how to realize the reading operation of Hbase API. The editor thinks it is very practical, so I share it with you for reference. I hope you can get something after reading this article.

1 Scan.setCaching (N), using cache when scanning to reduce the number of RPC from client to server. At the same time, note: cache usage increases on both the client and server sides.

/ / Set the number of rows for caching that will be passed to scanners.

2 close ResultScanner

Usage of 3-block cache: Get/Scan.setCacheBlocks (true/false); / / Set whether blocks should be cached for this Scan.

When using scanning in MR, it should be set to false

This is the end of the article on "how to read Hbase API". I hope the above content can be of some help to you, so that you can learn more knowledge. if you think the article is good, please share it for more people to see.

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