Preparation of NSC KIPT and JINR grid-infrastructures for data analysis at the CMS experiment (CERN)

At the running phase of the LHC experiments the requirements on computing centers for the LHC experiments, including CMS, are very strict because it would be necessary to process a huge amount of data at very high speed. For these purposes, a special distributed global grid-infrastructure named WLCG has been constructed. JINR LIT and 'Kharkov Institute of Physics and Technology' (NSC KIPT) computing centers, integrated into the WLCG infrastructure and certified at the CMS experiment as CMS Tier2 centers, demonstrate a high level of reliability at their operation. These centers' computing resources are mostly dedicated for analysis of CMS data. A proper WLCG elements configuration at JINR LIT and NSC KIPT grid-sites (especially Storage Elements) should be provided and actual versions of CMS specialized software should be supported to make possible the reconstruction and analysis of data registered by the CMS detector. Readiness of JINR LIT and NSC KIPT computing centers to the LHC start-up is discussed and the results of scale testing of JINR LIT and NSC KIPT grid-sites are presented