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AdministeringIn addition to administering the database server, you can tune performance, replicate data, and archive data.
System administrationThese topics contain concepts, procedures, and reference information for database and database server administrators to use for managing and tuning HCL OneDB™ database servers.
Administrator's GuideThe HCL OneDB™ Administrator's Guide provides the information required to administer HCL OneDB™.
Fault tolerance
Using mirroring
Manage mirroringYou can use the onspaces utility to manage mirroring.
Take down a mirror chunk

Take down a mirror chunk

When a mirror chunk is down, the database server cannot write to it or read from it. You might take down a mirror chunk to relink the chunk to a different device. (See Relink a chunk to a device after a disk failure.)

Taking down a chunk is not the same as ending mirroring. You end mirroring for a complete dbspace, which causes the database server to drop all the mirror chunks for that dbspace.