XProtect Express 1.1; Administrator's Manual - Milestone

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Milestone XProtect ® Express 1.1Administrator's ManualAbout archiving to other locationsWhen you archive to other locations than the default archiving directory, XProtect Express will first temporarilystore the archive in the local default archiving directory, then immediately move the archive to the archivinglocation you have specified.Archiving directly to a network drive can mean that archiving time varies depending on the available bandwidth onthe network. First storing the archive locally, then moving it speeds up the archiving procedure, and reducesdelays in case of network problems.If you archive to a network drive, the regular camera database can only be stored on a local drive attacheddirectly to the XProtect Express server.About dynamic archive pathsWith dynamic archiving paths, you specify a number of different archiving paths, usually across several drives.Using dynamic paths is recommended and is the default setting when you configure cameras through theConfigure video & recording wizard (see "About video and recording configuration" on page 75).If the path containing the camera's database is on one of the drives you have selected for dynamic archiving,XProtect Express will always try to archive to that drive first. If not, XProtect Express automatically archives to thearchiving drive with the most available space at any time, provided a camera database is not using that drive.The drive that has the most available space may change during the archiving process, and archiving maytherefore happen to several archiving drives during the same process. This will have no impact on how users findand view archived recordings.Dynamic archiving paths are general for all your cameras; you cannot configure dynamic archiving paths forindividual cameras.When deciding which drives to use for dynamic archiving, consider the pros and cons in the following examples(in which we assume that the default archiving path (see "Configure default file paths" on page 166) is on driveC:—drive letters are examples only, different drive letters may of course be used in your organization): Camera records to drive C: and archives to drive C:If the path containing the camera's database is on one of the drives you have selected for dynamicarchiving, XProtect Express will always try to archive to that drive first. Archiving will take place quickly,but may also fill up the drive with data fairly quickly. Camera records to drive C: and archives to drive D:Recordings and archives are on separate drives. Archiving takes place less quickly. XProtect Express willfirst temporarily store the archive in the local default archiving directory on C:, then immediately move thearchive to the archiving location on D:. Therefore, sufficient space to accommodate the temporaryarchive is required on C:.Camera 1 records to drive C: and archives to drive D: while Camera 2 records to drive D: andarchives to drive C:Avoid this. One camera's archiving may take up space required for another camera's recordings. In theabove example, Camera 1's archiving to D: may result in no recording space for camera 2 on D:. The ruleis: "Do not cross recording and archiving drives."•About archiving audioIf an audio source (for example, a microphone) is enabled on a hardware device, audio recordings are archivedtogether with video recordings from the camera attached to the hardware device. If the hardware device is a videoencoder with several channels, audio is archived with the camera on channel 1.When an audio source is enabled, audio is recorded to the associated camera’s database. This will affect thedatabase’s capacity for storing video. You may, therefore, want to use scheduled archiving more frequently ifrecording audio and video than if only recording video.www.milestonesys.com 120 Advanced configuration
Milestone XProtect ® Express 1.1Administrator's ManualStorage capacity required for archivingThe storage capacity required for archiving depends entirely on the amount of recordings you plan to keep, andon how long you want to keep them (retention time). Some organizations want to keep archived recordings from alarge number of cameras for several months or years. Other organizations may only want to archive recordingsfrom one or two cameras, and they may want to keep their archives for much shorter periods of time.You should always first consider the storage capacity of the local drive containing the default archiving directoryto which archived recordings are always moved, even though they may immediately after be moved to anarchiving location on another drive. Basically, the capacity of the local drive should be at least twice the sizerequired for storing the databases of all cameras.When you archive, XProtect Express automatically checks that space required for the data to be archived plus 1GB of free disk space per camera is available at the archiving location. If not, the archive location's oldest datafrom the camera in question will be deleted until there is sufficient free space for the new data to be archived.When you estimate storage capacity required for archiving, consider your organization's needs, then plan forworst case rather than best case scenarios.Tip: The Storage Calculator, found in the Support section of the Milestone website, can help you determine thestorage capacity required for your surveillance system.About archiving schedulesThere are two ways in which to configure archiving schedules:While you configure your cameras through the Configure Video and Recording wizard (see "TheConfigure Video and Recording wizard" on page 57), in which case you configure your archivingschedule on the wizard's Drive selection page.As part of the general Scheduling and Archiving properties: In the Management Application's navigationpane, expand Advanced Configuration, right-click Scheduling and Archiving, select Properties,select Archiving in the dialog, and specify required properties.Automatic response if running out of disk spaceIf XProtect Express runs of disk space while archiving, you can set up an automatic response. Two scenarios canoccur, depending on whether the camera database drive is different from, or identical to, the archiving drive:Different drives: Automatic archiving if database drive runs out of disk spaceIn case the XProtect Express server is running out of disk space, and the archiving drive is different from thecamera database drive, and archiving has not taken place within the last hour, archiving will automatically begin inan attempt to free up disk space. This will happen regardless of any archiving schedules. The server isconsidered to be running out of disk space if:there is less than 10% disk space left, and the available disk space goes below 30 GB plus 1.5 GB percamerathe available disk space goes below 150 MB plus 20 MB per camera (example: with ten cameras, theserver would be running out of disk space if the remaining available disk space went below 350 MB (150MB plus 20 MB for each of the ten cameras))The difference ensures that very large disks will not necessarily be considered to be running out of disk space justbecause they have less than 10% disk space left.On the archiving drive, XProtect Express automatically checks that the space required for data from a camera tobe archived plus 1 GB of free disk space per camera is available. If not, the archive drive's oldest data from thecamera in question will be deleted until there is sufficient free space for the new data to be archived.IMPORTANT: You will lose the archive data being deleted.www.milestonesys.com 121 Advanced configuration
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