Abstract: A method for responding to an extent change operation, the method may include receiving, by a storage system and from a requesting entity, a request to perform an extent content change operation that involves changing a content of a certain extent within a logical space supported by a storage system; generating, in response to the request, extent change operation information that comprises (a) an event counter indicative of a time of requested occurrence of the extent change operation, (ii) a type of extent change operation indicator, and (ii) logical addresses associated with the extent change operation; and sending to the requesting entity an acknowledgement indicative of a completion of the extent change operation before a completion of the extent change operation if an expected content of the certain extent is known before completion of the extent change operation.

Abstract: A method for responding to an extent change operation, the method may include receiving, by a storage system and from a requesting entity, a request to perform an extent content change operation that involves changing a content of a certain extent within a logical space supported by a storage system; generating, in response to the request, extent change operation information that comprises (a) an event counter indicative of a time of requested occurrence of the extent change operation, (ii) a type of extent change operation indicator, and (ii) logical addresses associated with the extent change operation; and sending to the requesting entity an acknowledgement indicative of a completion of the extent change operation before a completion of the extent change operation if an expected content of the certain extent is known before completion of the extent change operation.

Abstract: A computer implemented method of particular, although not exclusive application to analysing a plurality of molecules which comprises computing a kernel function for each pair of the plurality of molecules, the kernel function being representative of the number of features present in both molecules of the pairs and using the kernel function in a kernel based learning algorithm to model the relationship between the features and a property of the molecules. The method is also applicable to predicting a numerical value representing a characteristic of a molecule and, more generally, modelling instances of data in a database. A particular, although again not exclusive application, is the prediction of toxicity of a molecule.

Abstract: A computer implemented method of particular, although not exclusive application to analysing a plurality of molecules which comprises computing a kernel function for each pair of the plurality of molecules, the kernel function being representative of the number of features present in both molecules of the pairs and using the kernel function in a kernel based learning algorithm to model the relationship between the features and a property of the molecules. The method is also applicable to predicting a numerical value representing a characteristic of a molecule and, more generally, modelling instances of data in a database. A particular, although again not exclusive application, is the prediction of toxicity of a molecule.