Configuration UI

Exhibitor relies on shared configuration. Please see the separate wiki on Shared Configuration.

Path Configuration

Configuration	Description
ZooKeeper Install Dir	The local path to the ZooKeeper installation
ZooKeeper Data Dir	The local path to store ZooKeeper data

IMPORTANT: Exhibitor will stay in the “latent” state until the Path Configuration values have been set.

Ensemble Configuration

Configuration	Description
Servers	List of servers in the ensemble (comma separated). Each server should be in the form [Type]:[Server Id]:[Hostname]. The type should be either “S” for a standard server or “O” for an observer instance.
Additional Config	Any additional values to add to zoo.cfg
java.env script	Script to write as the “java.env” file which gets executed as part of the ZooKeeper start script. Optional – leave blank for no file.
log4j.properties	Contents of the log4j.properties file. Optional – leave blank for no file.

Ports Configuration

Configuration	Description
Client Port	The ZooKeeper client port (usually 2181)
Connect Port	The ZooKeeper connect port (usually 2888)
Election Port	The ZooKeeper election port (usually 3888)

Automatic Instance Management Configuration

Fixed Ensemble Size	If non-zero, automatic instance management will attempt to keep the ensemble at this fixed size.
Settling Period	Automatic Server List management will wait this long until the ZooKeeper ensemble has settled – i.e. no changes in quorum, etc. – before adding/removing instances.
Observer Threshold	Marks which instances are made Observers by automatic instance management. Instances below this number are normal instances. Instances from this number and up are Observers.
All At Once	If set to ‘yes’, automatic instance management will apply changes all at once instead of via rolling config change. Experience has shown that rolling config changes can lead to runtime problems with the ZooKeeper ensemble.

Miscellaneous Configuration

Log Index Dir	The local path to store indexed ZooKeeper transaction logs
Live Check	How often (in milliseconds) to check the ZooKeeper instance
Cleanup Period	How often (in milliseconds) to run the ZooKeeper log cleanup task
Cleanup: Max Log Files	The value to pass the ZooKeeper log cleanup task for maximum log files

Backup Configuration

Backup Period	How often (in milliseconds) to backup ZooKeeper transaction logs
Max Save	The maximum age (in milliseconds) for backed up logs before being garbage collected/deleted

The remaining config depends on what type of Backup you have selected.

File System Backup

Configuration	Description
Destination Path	Path to the directory to store backups

Amazon S3

Configuration	Description
Throttle	Data throttling. Maximum bytes per millisecond when performing I/O to Amazon
S3 Bucket Name	The S3 bucket to use
Max Retries	Maximum retries when uploading/downloading S3 data
Retry Sleep	Sleep time in milliseconds when retrying