Red Hat CLUSTER SUITE - CONFIGURING AND MANAGING A CLUSTER 2006 Manuale Utente Scaricare il pdf (Pagina 16)

Distributed Lock Manager



Red Hat Cluster Suite v.4 includes a Distributed Lock Manager (DLM)

●

Primarily used by Red Hat Global File System

●

Available for general purpose use by any application

●

Closely mirrors the original Digital VMS DLM



A DLM is a highly functional, distributed (cluster-wide), application

synchronization subsystem

●

Processes use the DLM to synchronize access to a shared resource (e.g. a

file, program, or device) by establishing locks on named resources

●

Permits the creation of distributed applications

●

e.g Oracle RAC (which uses a private DLM)

●

Provides a collection of services

●

Multiple lock spaces and concurrency (lock) modes

●

Lock hierarchies/domains (resources & subresources)

●

Range locking

●

Lock conversions & value blocks

●

Blocking notifications

●

Asynchronous completions

1 2 ... 11 12 13 14 15 16 17 18 19 20 21 ... 28 29

Nessun commento

Red Hat CLUSTER SUITE - CONFIGURING AND MANAGING A CLUSTER 2006 Manuale Utente Pagina 16