please add this to your question:
1. A few lines of an orignial file with changed essential data. So we won't steal anything.
2. What exactly do you want to extract out of it.
3. How exactly do you want to store the results.
Thank you.
UPDATE
So you start with file containing this blocks of code 
Startpoint: sdram_clk (clock source 'SDRAM_CLK')
  Endpoint: sd_DQ_out[6]
            (output port clocked by SD_DDR_CLK)
  Path Group: COMBO
  Path Type: max

  Point                                       Fanout       Cap     Tra
+ns      Incr       Path
  --------------------------------------------------------------------
+--------------------------
  clock SDRAM_CLK (fall edge)                                         
+    3.750000   3.750000
  sdram_clk (in)                                                0.1849
+22  0.065438 & 3.815438 f
  sdram_clk (net)                              17     0.124019        
+    0.000000   3.815438 f
  I_SDRAM_TOP/sdram_clk (SDRAM_TOP)                                   
+    0.000000   3.815438 f
  I_SDRAM_TOP/sdram_clk (net)                         0.124019        
+    0.000000   3.815438 f
  I_SDRAM_TOP/I_SDRAM_IF/sdram_clk (SDRAM_IF)                         
+    0.000000   3.815438 f
  I_SDRAM_TOP/I_SDRAM_IF/sdram_clk (net)              0.124019        
+    0.000000   3.815438 f
  I_SDRAM_TOP/I_SDRAM_IF/bufbdf_G1B1I16/I (bufbd7)              0.1878
+10  0.013919 & 3.829357 f
  I_SDRAM_TOP/I_SDRAM_IF/bufbdf_G1B1I16/Z (bufbd7)              0.2331
+13  0.210904 & 4.040261 f
  I_SDRAM_TOP/I_SDRAM_IF/sdram_clk_G1B1I16 (net)    45 0.175550       
+    0.000000   4.040261 f
  I_SDRAM_TOP/I_SDRAM_IF/sd_mux_dq_out_6/S (mx02d4)             0.2340
+98  0.003310 & 4.043571 f
  I_SDRAM_TOP/I_SDRAM_IF/sd_mux_dq_out_6/Z (mx02d4)             0.9991
+21  0.776377   4.819948 f
  I_SDRAM_TOP/I_SDRAM_IF/sd_DQ_out[6] (net)     1     0.475020        
+    0.000000   4.819948 f
  I_SDRAM_TOP/I_SDRAM_IF/sd_DQ_out[6] (SDRAM_IF)                      
+    0.000000   4.819948 f
  I_SDRAM_TOP/sd_DQ_out[6] (net)                      0.475020        
+    0.000000   4.819948 f
  I_SDRAM_TOP/sd_DQ_out[6] (SDRAM_TOP)                                
+    0.000000   4.819948 f
  sd_DQ_out[6] (net)                                  0.475020        
+    0.000000   4.819948 f
  sd_DQ_out[6] (out)                                            0.9991
+21  0.010237 & 4.830185 f
  data arrival time                                                   
+               4.830185

  clock SD_DDR_CLK (rise edge)                                        
+    7.500000   7.500000
  clock network delay (ideal)                                         
+    1.598546   9.098545
  clock uncertainty                                                   
+    -0.100000  8.998545
  output external delay                                               
+    -2.000000  6.998545
  data required time                                                  
+               6.998545
  --------------------------------------------------------------------
+--------------------------
  data required time                                                  
+               6.998545
  data arrival time                                                   
+               -4.830185
  --------------------------------------------------------------------
+--------------------------
  slack (MET)                                                         
+               2.168359

[download]
from which you want to extract this
  clock SDRAM_CLK
  sdram_clk
  sdram_clk
  I_SDRAM_TOP/sdram_clk
  I_SDRAM_TOP/sdram_clk
  I_SDRAM_TOP/I_SDRAM_IF/sdram_clk
  I_SDRAM_TOP/I_SDRAM_IF/sdram_clk
  I_SDRAM_TOP/I_SDRAM_IF/bufbdf_G1B1I16/I
  I_SDRAM_TOP/I_SDRAM_IF/bufbdf_G1B1I16/Z
  I_SDRAM_TOP/I_SDRAM_IF/sdram_clk_G1B1I16
  I_SDRAM_TOP/I_SDRAM_IF/sd_mux_dq_out_6/S
  I_SDRAM_TOP/I_SDRAM_IF/sd_mux_dq_out_6/Z
  I_SDRAM_TOP/I_SDRAM_IF/sd_DQ_out[6]
  I_SDRAM_TOP/I_SDRAM_IF/sd_DQ_out[6]
  I_SDRAM_TOP/sd_DQ_out[6]
  I_SDRAM_TOP/sd_DQ_out[6]
  sd_DQ_out[6]
  sd_DQ_out[6]

[download]
which is a sequence, which you want find all of in your entire file and count them? Did I get it correctly?

In reply to Re: How to manage a big file by Lennotoecom
in thread How to manage a pattern matching & counting with big data file by taj_ritesh

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