Elavarasan Kathirvel created HDDS-17606:
-------------------------------------------
Summary: EC key is read by short-circuit on a co-located client
Key: HDDS-17606
URL: https://issues.apache.org/jira/browse/HDDS-17606
Project: Apache Ozone
Issue Type: Bug
Reporter: Elavarasan Kathirvel
Short-circuit read is enabled on the cluster. An EC key is written and then
read from a client running on the same host as a datanode.
An EC key must use the normal read path via gRPC. Short-circuit is for Ratis
keys.
*Steps to Reproduce:*
* Enable Short-Circuit Read (SCR) on the client and all DataNodes.
** Run {{ozone debug checknative}} and verify that {{hadoop: true}} is
displayed on the client and DataNodes.
* Create an EC bucket, for example, {{{}RS-3-2{}}}.
* Create a 200 MB key and identify the replica host.
* Read the key from the replica host. and check the {{localBytesGetBlock}}
metric increases.
Expected:
* The read succeeds and the data matches.
* The client uses the normal read path via gRPC.
* {{numLocalGetBlock}} and {{localBytesGetBlock}} stays 0 on every datanode,
including the co-located one.
Actual:
* The read succeeds and the data matches.
* {{numLocalGetBlock}} and {{localBytesGetBlock}} increases on the co-located
datanode.
--
This message was sent by Atlassian Jira
(v10.3.26#10030026)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
