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To create a sequence, specify a start value and a block size. The block size specifies how often you go back to the database to update the number up to which you have allocated. This is referred to as the 'tidemark'. PhixFlow then allocates those numbers from the database and stores them in memory. When PhixFlow reserves a block, it marks the last reserved value in the database. 

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Tip

We recommend you set a large block size, to optimise performance.

If you require a continuous sequence of values for items:

  • in a small stream set, you may want to accept the overhead of assigning every value in the sequence from the database. In this case, set the Block Size to 1.
  • in larger stream sets, consider an alternative method of assigning the value.

Sequence Properties

To create a sequence, in the repository, right-click Sequences and click 

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