This project's goal is the hosting of very large tables - billions of rows X millions of columns - atop clusters of commodity hardware. Use Apache HBase when you need random, realtime read/write access to your Big Data. Please take .concurrent.size, .unt, .unt and .size into account when setting this config to avoid thread flooding. Apache HBase is the Hadoop database, a distributed, scalable, big data store. Base class for the hfile cleaning function inside the master.
#Hbase archive cleaner archive
The rate at which files were being moved to the archive exceeded our delete rate such that the archive had tens of millions of files putting a friction on all cluster ops. Make it able to do more work per cycle when needed. Number of regions: 1 Deployed on: localhost.localdomain,60020,1340917622717. The formula is as follows: Number of concurrent archive tasks Total size of log files to be archived/Size of. General interface for cleaning files from a folder (generally an archive or backup folder). On big clusters, it is possible to overrun the archive cleaning thread. and the readout ended with this : Summary: -ROOT- is okay. I ran this command ./bin/hbase hbck -repairHoles.
![hbase archive cleaner hbase archive cleaner](https://upload-images.jianshu.io/upload_images/2638668-66afd8d23c4c5b2a.png)
Somehow, my HBase installation has gotten totally corrupted. default hfile cleaners in the list as they will be overwritten in.
![hbase archive cleaner hbase archive cleaner](https://iksupplies.co.uk/wp-content/uploads/2019/05/ALUMINIUM-CLEANER-1-300x300.jpg)
and add the fully qualified class name here. implement your own BaseHFileCleanerDelegate, just put it in HBase's classpath.
#Hbase archive cleaner full
Parameters: file - full Path of the file to be checked.
Specified by: validate in class CleanerChore < BaseHFileCleanerDelegate >.If it is valid, then the file will go through the cleaner delegates, but otherwise the file is just deleted. In addition, .concurrent.size and .size support online re-configuration as .unt and .unt does.Ĥ. Running HBase in pseudo-distributed mode on my dev box. so put the cleaner that prunes the most files in front. Validate the file to see if it even belongs in the directory. We also support using multiple threads to clean wals under oldWALs directory through .size, 2 by default.ģ.
![hbase archive cleaner hbase archive cleaner](http://www.dongraberhomeimprovements.com/wp-content/uploads/2016/01/3-8-570x327.jpg)
Pay attention that 1.0 is different from 1, the former indicates it will use 100% of cores, while the latter will use only 1 thread for chore to scan dir.Ģ. we could use multiple threads to scan archive directories (including data and oldWALs) through config .concurrent.size, which supports both integer (meaning the concrete size, but no more than available cpu cores) and double (between >0.0 and <=1.0, meaning ratio of available cpu cores) value and defaults to 0.25.