[C#] Growing Values in RMW operations

[pablofrommars]

Similar to the problem described in #136. It would useful to be able to increase/modify the size of values during RMW operations. IFunctions.CopyUpdater allocates the size of newValue equals to the size of the old value.

Looks like the c++ port has support for the feature (#145), Is there a workaround for c#?

Thanks to anyone involved!

[badrishc]

This is already supported. The basic idea is:

1. Return false from InPlaceUpdater
2. FASTER will call GetLength (provided via SessionVariableLengthStructSettings parameter to NewSession) to get the size of the new value given the old value and the input.
3. FASTER will allocate this (larger) length, and call CopyUpdater with new value of this length.

See example here: https://github.com/microsoft/FASTER/blob/master/cs/samples/StoreVarLenTypes/AsciiSumSample.cs

[pablofrommars]

That's great news for my use case.

Thank you so much for the lightning fast support.