Applicable Products
- QuTS hero h5.3.0 or later
- Storage Manager
- iSCSI & Fibre Channel
Details
When creating or editing a shared folder or LUN, you can configure certain storage settings to optimize user experience and performance:
| Setting | Description |
|---|
| Compression | QuTS hero compresses the data in the shared folder or LUN to reduce the size of stored data. Enabling compression also reduces the total number of blocks that QuTS hero needs to read and write, increasing read and write speeds for the shared folder or LUN. Note - Compression does not impact overall system read/write and processor performance on ZFS file systems.
- Compression is enabled by default. We do not recommend disabling this setting unless necessary.
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| Deduplication | QuTS hero reduces the amount of storage needed by eliminating duplicate copies of repeated data. Important To enable deduplication, your NAS must have at least 16 GB of memory. |
| SSD read cache | QuTS hero adds data from this shared folder or LUN to the SSD cache to improve read performance. Note - To enable this setting, you must first create the SSD cache.
For details, see Creating the SSD cache. - The SSD cache is not available to a shared folder or LUN in the following situations:
- The shared folder or LUN's parent storage pool contains only SSDs.
- The shared folder or LUN's parent storage pool does not contain any SSDs.
|
| Fast clone | Fast clone enables QuTS hero to create copies of files faster. It also saves storage space by modifying file metadata, allowing original and copied files to share the same data blocks. Note - This setting is only available for thin shared folders and thin LUNs.
- Fast clone only works when the copied file is created in the same shared folder or LUN containing the original file.
- Fast clone does not improve the speed of snapshot restoration operations such as restoring files from a snapshot, snapshot revert, or snapshot clone.
|
| ZIL Synchronous I/O mode | The ZFS intent log (ZIL) synchronous I/O mode determines whether to prioritize data consistency or performance when reading and writing data in the shared folder or LUN. There are three options to choose from: - Auto: QuTS hero uses synchronous I/O or asynchronous I/O based on the application and the type of I/O request.
- Always: All I/O transactions are treated as synchronous and are always written and flushed to a non-volatile storage (such as an SSD or HDD). This option gives the best data consistency but might have a small impact on performance.
- None: All I/O transactions are treated as asynchronous. This option provides the highest performance but has a higher risk of data loss in the event of a power outage. If you select this option, ensure that a UPS (uninterruptible power supply) is installed.
|
| Performance profile (block size) | This setting allows you to specify the size of data blocks in the shared folder or LUN. Different options are suitable for different applications. Note - This setting can only be configured during shared folder or LUN creation. After creation, this setting is fixed and cannot be changed.
- The default value for shared folders is 128K.
- The default value for LUNs is 64K.
|
| Alert threshold | When the used capacity of the shared folder or LUN exceeds the specified threshold, the system sends an alert notification. |
Further Reading
QuTS hero User Guide
适用产品
- QuTS hero h5.3.0 or later
- Storage Manager
- iSCSI & Fibre Channel
详细信息
在创建或编辑共享文件夹或LUN时，您可以配置某些存储设置以优化用户体验和性能：
| 设置 | 描述 |
|---|
| 压缩 | QuTS hero压缩共享文件夹或LUN中的数据以减少存储数据的大小。启用压缩还减少了QuTS hero需要读写的块总数，从而提高共享文件夹或LUN的读写速度。 注意 - 在ZFS文件系统上，压缩不会影响整体系统读写和处理器性能。
- 默认情况下启用压缩。除非必要，我们不建议禁用此设置。
|
| 重复数据删除 | QuTS hero通过消除重复数据的副本来减少所需的存储数量。 重要 要启用重复数据删除，您的NAS必须至少有16 GB的内存。 |
| SSD 读取缓存 | QuTS hero将此共享文件夹或LUN的数据添加到SSD缓存中以提高读取性能。 注意 - 要启用此设置，您必须首先创建SSD缓存。
有关详细信息，请参见创建SSD缓存。 - 在以下情况下，SSD缓存对共享文件夹或LUN不可用：
- 共享文件夹或LUN的父存储池仅包含SSD。
- 共享文件夹或LUN的父存储池不包含任何SSD。
|
| 快速克隆 | 快速克隆使QuTS hero能够更快地创建文件副本。它还通过修改文件元数据来节省存储空间，使原始文件和复制文件共享相同的数据块。 注意 - 此设置仅适用于精简共享文件夹和精简 LUN。
- 快速克隆仅在复制的文件创建于包含原始文件的同一共享文件夹或LUN时有效。
- 快速克隆不会提高快照恢复操作的速度，例如从快照恢复文件、快照还原或快照克隆。
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| ZIL同步I/O模式 | ZFS意图日志（ZIL）同步I/O模式决定在共享文件夹或LUN中读写数据时是优先考虑数据一致性还是性能。有三种选项可供选择： - 自动：QuTS hero根据应用程序和I/O请求类型使用同步I/O或异步I/O。
- 始终：所有I/O事务都被视为同步，并始终写入和刷新到非易失性存储（如SSD或HDD）。此选项提供最佳的数据一致性，但可能对性能有轻微影响。
- 无： 所有I/O事务都被视为异步。此选项提供最高性能，但在断电情况下数据丢失的风险更高。如果选择此选项，请确保安装了UPS（不间断电源）。
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| 性能配置文件（块大小） | 此设置允许您指定共享文件夹或LUN中的数据块大小。不同的选项适用于不同的应用程序。 注意 - 此设置只能在共享文件夹或LUN创建时配置。创建后，此设置固定，无法更改。
- 共享文件夹的默认值为128K。
- LUN的默认值为64K。
|
| 警报阈值 | 当共享文件夹或LUN的使用容量超过指定阈值时，系统会发送警报通知。 |
进一步阅读
QuTS hero用户指南
