Key packing for flash key value store operations

Abstract

A key value (KV) store, a method thereof, and a storage system are provided herein. The KV store may include a key logger; and a processor configured to receive a first command for storing a first KV in the KV store, write a first value of the first KV to a first NAND page, generate an extent map for identifying the first memory page including the first value, write the extent map to a second memory page, append an entry for storing the first KV to the key logger, and update a device hashmap of the KV store to include a first key of the first KV, upon a threshold being met within the key logger.

1 . A method for improving carrier to noise density ratio of a matched filter, the method comprising:
 receiving a signal at a signal register of the matched filter;   receiving a local code at a local code register and a nulling register of the matched filter; and   correlating, at an adder tree of the matched filter, the signal register and the local code register with respect to the nulling register to obtain a correlation result, wherein the nulling register prevents high frequency samples of the signal register from affecting the correlation result.   
     
     
         2 . The method of  claim 1 , wherein the matched filter corresponds to a narrowband receiver in a global navigation satellite system (GNSS). 
     
     
         3 . The method of  claim 2 , wherein the signal is a time multiplexed binary offset carrier (TMBOC) transmission. 
     
     
         4 . The method of  claim 3 , wherein the TMBOC transmission comprises an L1-C p  channel having binary offset carrier (BOC)(1,1) and BOC (6,1) spreading symbols. 
     
     
         5 . The method of  claim 4 , wherein the high frequency samples comprise the BOC (6,1) spreading symbols of the L1-C p  channel. 
     
     
         6 . The method of  claim 1 , wherein receiving the signal comprises:
 receiving signal samples at a signal processor of the matched filter; and   processing the signal samples using frequencies from a carrier numerically-controlled oscillator (NCO) of the matched filter.   
     
     
         7 . The method of  claim 6 , wherein receiving the signal further comprises:
 digitizing the processed signal samples at a quantizer of the matched filter; and   providing the digitized processed signal samples to the signal register.   
     
     
         8 . The method of  claim 1 , wherein receiving the local code comprises:
 generating the local code at a local code generator of the matched filter.   
     
     
         9 . The method of  claim 8 , wherein the local code is a 1-bit stream local code. 
     
     
         10 . The method of  claim 1 , wherein the nulling register is aligned with timings of the high frequency samples of the signal register. 
     
     
         11 . A matched filter for improving carrier to noise density ratio, the matched filter comprising:
 a signal register receiving a signal;   a local code register receiving a local code;   a nulling register receiving the local code; and   an adder tree correlating the signal register and the local code register with respect to the nulling register to obtain a correlation result, wherein the nulling register prevents high frequency samples of the signal register from affecting the correlation result.   
     
     
         12 . The matched filter of  claim 11 , wherein the matched filter corresponds to a narrowband receiver in a global navigation satellite system (GNSS). 
     
     
         13 . The matched filter of  claim 12 , wherein the signal is a time multiplexed binary offset carrier (TMBOC) transmission. 
     
     
         14 . The matched filter of  claim 13 , wherein the TMBOC transmission comprises an L1-C p  channel having binary offset carrier (BOC)(1,1) and BOC (6,1) spreading symbols. 
     
     
         15 . The matched filter of  claim 14 , wherein the high frequency samples comprise the BOC (6,1) spreading symbols of the L1-C p  channel. 
     
     
         16 . The matched of  claim 11 , further comprising:
 a carrier numerically-controlled oscillator (NCO) outputting frequencies; and   a signal processor receiving signal samples and processing the signal samples using the frequencies from the carrier NCO.   
     
     
         17 . The matched filter of  claim 16 , further comprising:
 a quantizer digitizing the processed signal samples and providing the digitized processed signal samples to the signal register.   
     
     
         18 . The matched filter of  claim 11 , further comprising:
 a local code generator generating the local code and providing the local code to the local code register and the nulling register.   
     
     
         19 . The matched filter of  claim 18 , wherein the local code is a 1-bit stream local code. 
     
     
         20 . The matched filter of  claim 11 , wherein the nulling register is aligned with timings of the high frequency samples of the signal register.