Re: [HACKERS] patch: update README-SSI

2011-06-16 Thread Heikki Linnakangas
On 16.06.2011 20:33, Dan Ports wrote: On Thu, Jun 16, 2011 at 04:39:09PM +0300, Heikki Linnakangas wrote: There's no mention on what T1 is. I believe it's supposed to be Tin, in the terminology used in the graph. Yes, I changed the naming after I originally wrote it, and missed a couple spots.

Re: [HACKERS] patch: update README-SSI

2011-06-16 Thread Dan Ports
On Thu, Jun 16, 2011 at 04:39:09PM +0300, Heikki Linnakangas wrote: > There's no mention on what T1 is. I believe it's supposed to be Tin, in > the terminology used in the graph. Yes, I changed the naming after I originally wrote it, and missed a couple spots. T1 should be Tin. > I don't see how

Re: [HACKERS] patch: update README-SSI

2011-06-16 Thread Heikki Linnakangas
On 15.06.2011 23:28, Dan Ports wrote: +SSI is based on the observation [2] that each snapshot isolation +anomaly corresponds to a cycle that contains a "dangerous structure" +of two adjacent rw-conflict edges: + + Tin --> Tpivot --> Tout +rw rw + +SSI works by

[HACKERS] patch: update README-SSI

2011-06-15 Thread Dan Ports
The attached patch updates README-SSI. In addition to some minor edits, changes include: - add a section at the beginning that more clearly describes the SSI rule and defines "dangerous structure" with a diagram. It describes the optimizations we use about the relative commit times, and the