Data centers are complex systems that require sophisticated operational management approaches to provide the availability of digital services against the backdrop of cost and energy eiciency. To achieve this, data center telemetry data is required since, as is commonly said it is not possible to manage what cannot be measured. This paper details how it is possible to construct the key data center infrastructure management (DCIM) elements of monitoring and measuring by a combination of available opensource software tools that permit both scalability and an environment where analytics can be employed on the data center operation, which can ofer relevant insight into energy eicient operational practices.
Ericsson Radio Systems AB, S-164 80 Stockholm SWEDEN * Erisoft AB, S-951 10 Lule% ABSTRACTThe bit rate of CELP coders can be significantly reduced by increasing the length of the analysis frame and the subframes. When frame lengths of 30-40 ms and above are used, new problems that reduce speech quality do become prominent. The paper discusses the origin of some of these problems, and suggests techniques that can be applied in order to improve quality and reduce computational complexity for long frames and subframes. Promising results have been obtained for a new interpolation constrained time variable LPC algorithm and, in particular, for a new double mode LTP structure. Experimental results on delayed decision tree coding and low complexity innovation coding are also presented.
11-6040-7803-0946-4/93 $3.00 0 1993 IEEE
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