[IMPALA-8495] Impala Doc: Document Data Read Cache

• Type: Task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: Impala 3.3.0
• Fix Version/s: Impala 3.3.0
• Component/s: Docs
• Labels: in_33
• Target Version: Impala 3.3.0
• Epic Color: ghx-label-9
• Assignee: Alexandra Rodoni
• Reporter: Michael Ho
• Created: 04/May/19 15:24
• Updated: 28/Aug/19 22:00
• Resolved: 28/Aug/19 22:00

Description

IMPALA-8341 introduces a data cache for remote reads. In particular, it caches data for non-local reads (e.g. S3, ABFS, ADLS). The data cache can be enabled setting the startup flag --data_cache=<dir1>,<dir2>,...,<dirN>:<quota> in which <dir1>,...,<dirN> are directories on local filesystem and quota is the storage consumption quota for each directory. Note that multiple Impala daemons running on the same host must not share cache directories.

Issue Links

• is related to: IMPALA-8341 Data cache for remote reads