Murat
Alvaro Herrera wrote:
On Fri, Sep 10, 2004 at 11:52:26AM -0500, Murat Kantarcioglu wrote:
Can you suggest me a solution to how to do this on Postgresql backend?
I am asssuming that somewhere in the code, you are calling a function like getPage(Page_id) to retrieve the page(I am trying to change backend)
Probably the code you want to modify is in src/backend/storage/smgr. Maybe you want to add a different storage manager (they are pluggable, sort of).
getPage(Page_id) { ctr=Hash_Table(Page_id) //return somevalue needed for deccryption Thread_Read(Page_id) // will call the original read code Thread_Encryption.start(ctr, length); when both threads are done finish the encryption }
I think it would need extensive, painful and unwelcome modifications to use threads to do the job. You could just as well do it sequentially, like in
encryptedPage = getPage(page_id); clearPage = unencrypt(encryptedPage); return clearPage;
And the reverse for storage. This may only need modifications to mdread() and mdwrite() ... unless your encryption scheme returns a different length than the original.
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