Dell PowerStore Configuring Multiprotocol File Sharing

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File system advanced settings for SMB

You can add advanced settings to SMB-enabled file systems while creating a file system.

Table 1. File system advanced settings for SMBColumn one lists the setting, column two provides a description for each setting.
Setting	Description
Sync Writes Enabled	When you enable the synchronous writes option for a Windows (SMB) or multiprotocol file system, the storage system performs immediate synchronous writes for storage operations, regardless of how the SMB protocol performs write operations. Enabling synchronous write operations enables you to store and access database files (for example, MySQL) on storage system SMB shares. This option guarantees that any write to the share is done synchronously and reduces the chances of data loss or file corruption in various failure scenarios, for example, loss of power. The synchronous writes option is disabled by default. NOTE:The synchronous writes option can have a significant impact on performance. It is not recommended unless you intend to use Windows file systems to provide storage for database applications.
Oplocks Enabled	The following oplocks implementations are supported: Level II oplocks, which informs a client that multiple clients are accessing a file, but no client has yet modified it. A level II oplock lets the client perform read operations and file attribute fetches, by using cached or read-ahead local information. All other file access requests must be sent to the server. Exclusive oplocks, which informs a client that it is the only client opening the file. An exclusive oplock lets a client perform all file operations by using cached or read-ahead information until it closes the file, at which time the server must be updated with any changes that are made to the state of the file (contents and attributes). Batch oplocks, which informs a client that it is the only client opening the file. A batch oplock lets a client perform all file operations by using cached or read-ahead information (including opens and closes). The server can keep a file opened for a client even though the local process on the client machine has closed the file. This mechanism curtails the amount of network traffic by letting clients skip the extraneous close and open requests.
Notify on Write Enabled	Enable notification when a file system is written to. This option is disabled by default.
Enable Notify on Access Enabled	Enable notification when a file system is accessed. This option is disabled by default.