girlmad writes "Rackspace has come out fighting against one of the U.S.'s most notorious patent trolls, Parallel Iron. The cloud services firm said it's totally fed up with trolls of all kinds, which have caused a 500 percent rise in its legal bills. Rackspace was last week named among 12 firms accused of infringing Parallel Iron's Hadoop Distributed File System patents. Rackspace is now counter-suing the troll, as the firm said it has a deal in place with Parallel Iron after signing a previous patent settlement with them."
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