PI Server

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  1. Optimize the storage and retrieval of digital tags

    Given that the archive file format is proprietary, this suggestion is me shooting in the dark.

    Disk compression compresses archive files very well, and my guess is that most of this compression occurs on the digital tags, since the number of possible values that they can take on is limited. In contrast, the number of possible values that a floating-point tag can have is huge, so there is not much opportunity for compression.

    Please consider optimizing the storage of digital tags so that their data takes up less space in the archive and can potentially be retrieved faster.

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    7 comments  ·  Data Archive  ·  Flag idea as inappropriate…  ·  Admin →

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  2. Dynamic digital state sets

    Currently, the values of string tags are stored in full for each event, which is a waste of space for string tags that have the same values appearing frequently. To save space, a digital tag can be used instead. However, to create this tag's digital state set, we must know ahead of time all possible strings that the tag may store, and this may not be possible or feasible.

    My suggestion is to introduce dynamic digital state sets. That is, tags using dynamic digital state sets would receive strings from the data source. If the string is not already part…

    1 vote

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  3. Provide the user ability to select Event Frame templates during the Batch to Event Frames Migration

    During the Batch to Event Frames Migration, all migrated Event Frames are created with 'Migrated' templates (i.e. PIBatchMigrated, PIUnitBatchMigrated, etc.). I would like the ability to pick and choose what templates migrated Event Frames are created with.

    As some background, Batch Interfaces currently use a standard set of EF Templates -- 'Procedure' template for the top level Event Frame, 'UnitProcedure' template for the first child level, etc. I would like to assign these default templates to Event Frames created by the migration process. This will ensure perfect continuity between migrated Event Frames and future Event Frames created by any Batch…

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  4. Wave Form Data Collection

    A few customers would like the capability of storing vibration wave form data in PI. They often measure data in MHz and GHz frequencies, which are at a finer resolution that the PI Data Archive is capable of storing. The wave forms are captured over periods from 2 to 30 seconds and only saved if there is an interesting event.

    Customers in data centers are also requesting power quality wave form storage in PI.

    1 vote

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    ANSWERED  ·  1 comment  ·  Data Archive  ·  Flag idea as inappropriate…  ·  Admin →

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  5. PI Archive File header should keep track of last modified recno

    The PI Archive File should keep track of the last modified RecNo. This would make cases where historical archive last modified times are updated (and potentially causing large backups) much easier to track down.

    In particular, this feature combined with the new Snapshot_TracePointID tuning parameter in PI Data Archive 2017+ would make figuring out what is updating archive last modified times much more straightforward.

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  6. pisrvstart and pisrvstop scripts should have pilogsrvX64

    pisrvstart.bat and pisrvstop.bat scripts should have "pilogsrvX64" added to them.  Currently all services except the "PIPC Log Server x64" are started/stopped by these scripts.

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    This log service is used by 64 bit application that loads the PI API. The most common being 64 bit PI Interfaces. Therefore if you have 64 bit PI API based applications, these scripts should start/stop the service for you. Please contact tech support if you have these applications and pilogsrvx64 is not in your pisrvstart and pisrvstop scripts.

    As a side note, recent releases of the PI Server implements virtual service accounts for all the Data Archive related services so please consider it for an upgrade.

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