up to 100. These events are then processed by the HLT computer farm. The HLT software selects events for storage and offline analysis at a rate of a few hundred Hz. The HLT algorithms consist of sequences of offline-style reconstruction and filtering modules.

The 2010 CMS razor-based inclusive search for SUSY [@razor2010] used triggers based on the scalar sum of jet $\pt$, $\HT$, for hadronic final states and single-lepton triggers for leptonic final states. Because of the higher peak luminosity of the LHC in 2011, the corresponding triggers for 2011 had higher thresholds. To preserve the high sensitivity of the razor analysis, CMS designed a suite of dedicated razor triggers, implemented in the spring of 2011. The total integrated luminosity collected with these triggers was 4.7at $\sqrt{s} = 7$.

The razor triggers apply thresholds to the values of ${\ensuremath{M_R}\xspace}$ and ${\ensuremath{R}\xspace}$ driven by the allocated bandwidth. The algorithms used for the calculation of ${\ensuremath{M_R}\xspace}$ and ${\ensuremath{R}\xspace}$ are based on calorimetric objects. The reconstruction of these objects is fast enough to satisfy the stringent timing constraints imposed by the HLT.

Three trigger categories are used: hadronic triggers, defined by applying moderate requirements on ${\ensuremath{M_R}\xspace}$ and ${\ensuremath{R}\xspace}$ for events with at least 