Tuning the filewalker

[Toyoo]

@snorkel

During the run, does the FW sends info to the satellites?

No.

@snorkel

Does the node needs uninteruptible internet access? Or if the internet access is lost during or when FW finishes, all it’s progress is useless and needs to do a new run?

File walker is not affected by being offline.

@snorkel

satellites send bloom filters

Yes.

@snorkel

• aka lists of pieces that should be deleted, to nodes that have those pieces;

No, a bloom filter is not a list of pieces that should be deleted. See my text on what a bloom filter is.

@snorkel

• these lists are stored in piece_expiration.db;

No, this database is used to store information on pieces where the uploader decided at the time of upload that they are to be deleted at specific time. Most pieces do not have this information.

@snorkel

• the GC checks periodicaly this db and than sends the pieces to Trash;

No, this database is checked by another chore.

@snorkel

• after 7 days, GC deletes those pieces for good;

No, this is a separate chore.

@snorkel

• the FW reads some data from all the pieces from the drive and tells who what?

Not sure what you ask about.

@snorkel

• why does GC needs FW to delete those pieces, if the node knows that it stored them and the bloom filtes tells GC what to delete?

The node does not actually keep information on what it stores, and it doesn’t have information what it is expected to store. All it knows is that there is a directory with files to serve. If you manually put a piece file there, it can be served as well (assuming all necessary cryptographic signatures match what satellite/customer expects).