Andrew Wong has uploaded this change for review. ( http://gerrit.cloudera.org:8080/9783
Change subject: KUDU-16: enable server-side limits on scanners ...................................................................... KUDU-16: enable server-side limits on scanners This patch adds the functionality to specify limits to the number of rows returned per tablet server scanner. Internally, each server-side scanner now tracks the number of rows it has already returned and adjusts the number of rows to serialize per batch based on this limit. This patch also adds a public API to allow the specification of per-client-side-scanner limits on the number of rows returned. Each scanner will maintain a count of the number of rows already read, and adjust the server-side limit upon sending the next scan request. The existing uint64 protobuf field has been deprecated and replaced with a new int64 field. There are a few unit tests included to verify that the limits act as expected. I also verified that lowering the limit reduces the number of bytes read on disk. This patch does not implement the behavior for scan tokens. That will come in a later patch. Change-Id: I3ca5ddff09f4910d12f80259bd11e4027f99aa7c --- M src/kudu/client/client-test.cc M src/kudu/client/client.cc M src/kudu/client/client.h M src/kudu/client/scan_configuration.cc M src/kudu/client/scan_configuration.h M src/kudu/client/scanner-internal.cc M src/kudu/client/scanner-internal.h M src/kudu/common/scan_spec.cc M src/kudu/common/scan_spec.h M src/kudu/common/wire_protocol.cc M src/kudu/common/wire_protocol.h M src/kudu/tserver/scanners.cc M src/kudu/tserver/scanners.h M src/kudu/tserver/tablet_server-test.cc M src/kudu/tserver/tablet_service.cc M src/kudu/tserver/tserver.proto 16 files changed, 354 insertions(+), 76 deletions(-) git pull ssh://gerrit.cloudera.org:29418/kudu refs/changes/83/9783/1 -- To view, visit http://gerrit.cloudera.org:8080/9783 To unsubscribe, visit http://gerrit.cloudera.org:8080/settings Gerrit-Project: kudu Gerrit-Branch: master Gerrit-MessageType: newchange Gerrit-Change-Id: I3ca5ddff09f4910d12f80259bd11e4027f99aa7c Gerrit-Change-Number: 9783 Gerrit-PatchSet: 1 Gerrit-Owner: Andrew Wong <[email protected]>
