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What is snapshot retention?
A retention policy specifies the following: The number daily snapshots to retain. For example, if daily snapshots are set to 10, then the last 10 daily snapshots will be retained. If daily snapshots are set to 0, then the current daily snapshot will be deleted when the next day starts.
How do Synology snapshots work?
The “snapshot” is a point-in-time copy stored in the same volume used to record the whole data status at the time upon being taken. Snapshots use only a small amount of additional storage space, and exert little impact on system performance.
How much space does a Synology snapshot take?
Maximum number of snapshots per system: Memory exceeding or equivalent to 2 GB (factory-installed): 65,536. Others: 4,096.
What is snapshot retention period?
The retention period represents the number of days to retain automated snapshots. If the retention period is set to zero, automated snapshots are disabled for your Redshift clusters.
What is a recommendation for a virtual machine VM snapshot?
The maximum supported amount of snapshots in a chain is 32. However, VMware recommends that you use only 2-3 snapshots in a chain. Use no single snapshot for more than 24-72 hours. Snapshots should not be maintained over long periods of time for application or Virtual Machine version control purposes.
What is Btrfs snapshot?
Snapshots are an interesting feature of Btrfs. A snapshot is a copy of a subvolume. Taking a snapshot is immediate. However, taking a snapshot is not like performing a rsync or a cp, and a snapshot doesn’t occupy space as soon as it is created.
What is a Synology volume?
A volume is the basic storage space on your Synology NAS and is constructed on a storage pool. 1 For Synology NAS models supporting the quick creation mode, you can create a volume and a storage pool at the same time and the Volume Creation Wizard will automatically optimize storage capacity and performance.
What is hyper backup?
Hyper Backup is an app for the Synology NAS for backing up important data from the NAS to other external devices and cloud backup platforms (i.e., Google Drive, Dropbox). Hyper Backup can also restore data from the backup. Some of the features of the Hyper Backup app are: Backup data to local Synology NAS device.
How much space does a snapshot take?
The amount of space you need for Snapshot copies is 21 × 2 GB, or 42 GB. Determine how much space you need for overwrites by multiplying your ROC by the amount of time, in days, you need to update your system when space is scarce.
Why is it important to use snapshot replication?
Snapshot Replication provides schedulable, near-instantaneous data protection, ensuring business data in shared folders, and virtual machines in iSCSI LUNs, remain safe and available in the event of disaster.
How is a snapshot generated for Merge Replication?
For merge replication, a snapshot is generated every time the Snapshot Agent runs. For transactional replication, snapshot generation depends on the setting of the publication property immediate_sync.
Is there a maximum number of snapshots you can keep in synology?
There are a few things to note about Retention Policy: Synology employs the GFS, or Grandfather-Father-Son retention policy. You can configure the maximum amounts of snapshot versions to be retained for the following time ranges respectively: hourly, daily, weekly, monthly, and yearly. One snapshot can meet several retention rules at the same time.
How to restore a data warehouse from a snapshot?
You can restore your data warehouse in the primary region from any one of the snapshots taken in the past seven days. To see when the last snapshot started, run this query on your online dedicated SQL pool. This feature enables you to manually trigger snapshots to create restore points of your data warehouse before and after large modifications.