[
https://issues.apache.org/jira/browse/HBASE-16392?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16030548#comment-16030548
]
Vladimir Rodionov commented on HBASE-16392:
-------------------------------------------
Message is in Delete command (BackupCommands class):
{code}
@Override
public void execute() throws IOException {
if (cmdline == null || cmdline.getArgs() == null ||
cmdline.getArgs().length < 2) {
printUsage();
throw new IOException(INCORRECT_USAGE);
}
super.execute();
String[] args = cmdline.getArgs();
String[] backupIds = new String[args.length - 1];
System.arraycopy(args, 1, backupIds, 0, backupIds.length);
try (BackupAdminImpl admin = new BackupAdminImpl(conn);) {
int deleted = admin.deleteBackups(backupIds);
System.out.println("Deleted " + deleted + " backups. Total requested: "
+ args.length);
} catch (IOException e) {
System.err.println("Delete command FAILED. Please run backup repair
tool to restore backup system integrity");
throw e;
}
}
{code}
> Backup delete fault tolerance
> -----------------------------
>
> Key: HBASE-16392
> URL: https://issues.apache.org/jira/browse/HBASE-16392
> Project: HBase
> Issue Type: Sub-task
> Reporter: Vladimir Rodionov
> Assignee: Vladimir Rodionov
> Labels: backup
> Fix For: 2.0.0
>
> Attachments: HBASE-16392-v1.patch, HBASE-16392-v2.patch
>
>
> Backup delete modified file system and backup system table. We have to make
> sure that operation is atomic, durable and isolated.
> Delete operation:
> # Start backup session (this guarantees) that system will be blocked for all
> backup commands during delete operation
> # Save list of tables being deleted to system table
> # Before delete operation we take backup system table snapshot
> # During delete operation we detect any failures and restore backup system
> table from snapshot, then finish backup session
> # To guarantee consistency of the data, delete operation MUST be repeated
> # We guarantee that all file delete operations are idempotent, can be
> repeated multiple times
> # Any backup operations will be blocked until consistency is restored
> # To restore consistency, repair command must be executed.
> # Repair command checks if there is failed delete op in a backup system
> table, and repeats delete operation
--
This message was sent by Atlassian JIRA
(v6.3.15#6346)
