Abstract: Embodiments are directed to managing data in a file system. A pre-fetch engine may receive requests from a client the file system that includes a pre-fetch storage tier and a file storage tier of storage devices. The pre-fetch engine determines a pre-fetch policy based on the requests such that the pre-fetch policy determines which blocks to copy to the pre-fetch storage tier. And, the pre-fetch policy may be associated with a score model that includes score rules where one of the rules may be associated with a client score. The pre-fetch engine may obtain scores associated with the score rules such that the scores are based on previous requests made by the client. In response to scores exceeding a threshold value, the pre-fetch engine may copy the blocks to the pre-fetch storage tier. The pre-fetch engine may update the scores based on the performance of the pre-fetch policy.

Abstract: Embodiments are directed to managing data in a file system. An engine may receive read requests associated with a file system that includes pre-fetch storage and file storage. The engine may employ a pre-fetch policy selected from a plurality of pre-fetch policies to copy blocks to pre-fetch storage. The engine may evaluate the selected pre-fetch policy and also evaluate simulated performances for each unselected pre-fetch policy based on subsequent read requests. The engine may provide a performance score based on the evaluation of the selected pre-fetch policy and it may provide other performance scores based on the simulated evaluation of each unselected pre-fetch policy If one of the other performance scores for one of the unselected pre-fetch policies exceeds the performance score of the selected pre-fetch policy, the engine may select that unselected pre-fetch policies as a new selected pre-fetch policy.

Abstract: A method and system for distributing and enforcing security policies is provided. A firewall agent executing at a host computer system that is to be protected receives security policies for the enforcement engines responsible for enforcing the security policies on the host computer system. A security policy has rules that each provide a condition and action to be performed when the condition is satisfied. A rule also has a rule type that is used by the distribution system to identify the security components that are responsible for enforcing the rules. To distribute the security policies that have been received at a host computer system, the firewall agent identifies to which enforcement engine a rule applies based in part on rule type. The firewall agent then distributes the rule to the identified enforcement engine, which then enforces the rule.