Red Hat Summit Red Hat SummitSupportoConsoleSviluppatoriInizia una provaContatti

Questo contenuto non è disponibile nella lingua selezionata.

7.8. GET and PUT Usage in Distribution Mode

In distribution mode, the cache performs a remote GET command before a write command. This occurs because certain methods (for example, Cache.put()) return the previous value associated with the specified key according to the java.util.Map contract. When this is performed on an instance that does not own the key and the entry is not found in the L1 cache, the only reliable way to elicit this return value is to perform a remote GET before the PUT.
The GET operation that occurs before the PUT operation is always synchronous, whether the cache is synchronous or asynchronous, because Red Hat JBoss Data Grid must wait for the return value.
Report a bug

7.8.1. Distributed GET and PUT Operation Resource Usage
Copia collegamento

In distribution mode, the cache may execute a GET operation before executing the desired PUT operation.
This operation is very expensive in terms of resources. Despite operating in an synchronous manner, a remote GET operation does not wait for all responses, which would result in wasted resources. The GET process accepts the first valid response received, which allows its performance to be unrelated to cluster size.
Use the Flag.SKIP_REMOTE_LOOKUP flag for a per-invocation setting if return values are not required for your implementation.
Such actions do not impair cache operations and the accurate functioning of all public methods, but do break the java.util.Map interface contract. The contract breaks because unreliable and inaccurate return values are provided to certain methods. As a result, ensure that these return values are not used for any important purpose on your configuration.
Report a bug
Torna in cima
Red Hat logoGithubredditYoutubeTwitter

Formazione

Prova, acquista e vendi

Community

Informazioni sulla documentazione di Red Hat

Aiutiamo gli utenti Red Hat a innovarsi e raggiungere i propri obiettivi con i nostri prodotti e servizi grazie a contenuti di cui possono fidarsi. Esplora i nostri ultimi aggiornamenti.

Rendiamo l’open source più inclusivo

Red Hat si impegna a sostituire il linguaggio problematico nel codice, nella documentazione e nelle proprietà web. Per maggiori dettagli, visita il Blog di Red Hat.

Informazioni su Red Hat

Forniamo soluzioni consolidate che rendono più semplice per le aziende lavorare su piattaforme e ambienti diversi, dal datacenter centrale all'edge della rete.

Theme

© 2025 Red Hat