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st: RE: chunky errors
From
"Buzz Burhans" <[email protected]>
To
<[email protected]>
Subject
st: RE: chunky errors
Date
Sat, 20 Nov 2010 16:12:53 -0700
Dimitriy,
I can't help you with the -chunky- error, but might have an alternative. I
recently had to split a large csv file with 1.7 million records; I
successfully used a freeware utility (standalone, not inside Stata) called
"gsplit". It allowed me to split by line, so I could keep records together,
and it allowed me to add a header to each split subfile, which made
importing into Stata easier.
Gsplit is available for download at:
http://www.gdgsoft.com/gsplit/
I also looked at, but ended up not using, file splitter, available as a
download on CNET:
http://download.cnet.com/File-Splitter/3000-2248_4-10405033.html
Good luck
Buzz Burhans, Ph.D.
Dairy-Tech Group
So. Albany, VT / Twin Falls ID
Cell: 208-320-0829
ID Fax: 208-735-1289
VT Fax: 802-755-6842
Email: [email protected]
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Dimitriy V.
Masterov
Sent: Saturday, November 20, 2010 3:41 PM
To: Statalist
Subject: st: chunky errors
I am running Stata/MP 11.1 on 64-bit Windows 7 laptop with 8 gigs of
RAM. I am trying to read in 10.9 GB csv file by breaking it up using
chunky. I am getting an error message that I can't interpret. The file
has 5,320,745 rows and 387 columns. It's got some weird ascii
characters in beginning of the first line (ï,»,¿), but I can't open
the file in any text editor to edit them out (vi crashes even when I
try to edit the first line with ex). I don't know if this is what's
causing the problem.
The first chunk file rpd_1.txt is created, but it is empty.
Here's what I am doing:
> set mem 6g;
Current memory allocation
current memory usage
settable value description (1M = 1024k)
--------------------------------------------------------------------
set maxvar 5000 max. variables allowed 1.947M
set memory 6144M max. data space 6,144.000M
set matsize 400 max. RHS vars in models 1.254M
-----------
6,147.201M
. chunky using raw_price_data.csv, peek(2);
Peeking at the first 2 lines of raw_price_data.csv
1003,2008-03-23,0,Disc,NULL,7.99,7.87678139240359,8.35,8.56885514506366,1
0.7974394069005,NULL,10.2566666666667,6.99,6.99,7.99,7.77333333333333,10.36
>
5,NULL,NULL,5.99,5.99,5.99,NULL,9.29,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL
,NULL,6.32666666666667,6.96559727916511,8.04833333333333,8.70765897152336,1
>
0.4373620377794,NULL,NULL,6.99,6.47333333333333,6.99,6.80999783830523,10.071
0149156939,6.19008481948673,7.61715989563921,NULL,NULL,NULL,NULL,NULL,7.99,
>
NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,7,7.99115044247788,NULL,11.19,N
ULL,NULL,5,5,5.675,NULL,NULL,NULL,NULL,5.99,5.99,NULL,NULL,NULL,NULL,NULL,N
>
ULL,NULL,NULL,NULL,NULL,NULL,NULL,7.99,5.096875,NULL,NULL,7.99,NULL,NULL,NUL
L,4.52849423193685,NULL,7.26876442015786,NULL,NULL,NULL,NULL,NULL,NULL,NULL
>
,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,2.52905297740543,2.280611
20807602,2.29737689297299,NULL,4.29484076024002,NULL,NULL,4.99,NULL,0.69866
>
8055269689,1.70842964884469,NULL,1003,2008-03-23,0,Disc,NULL,2.07,2.34533333
333333,2.42321376851818,2.68166666666667,2.92333333333333,NULL,2.7948205128
>
2051,0.99,1.22441441441441,1.58435261707989,1.9752380952381,2.295,NULL,NULL,
1.056,1.415,1.305,NULL,2.07,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,2.
>
06415557325445,2.26902502939606,2.59914202498692,2.87889430894309,3.16111111
111111,NULL,NULL,1.11586088873419,1.29769942196532,1.38903947368421,1.65,1.
>
645,1.57740131578947,1.53326226012793,NULL,NULL,NULL,NULL,NULL,1.56,NULL,NUL
L,NULL,NULL,NULL,NULL,NULL,NULL,NULL,2.4115,2.55,NULL,2.385,NULL,NULL,0.975
>
,1.27613965826475,1.2675,NULL,NULL,NULL,NULL,1.10231092436975,1.282689075630
25,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,2.0681468218
>
4423,2.44601506503719,NULL,NULL,2.41783348254252,NULL,NULL,NULL,1.2828851963
7462,NULL,1.84778700906344,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NUL
>
L,NULL,NULL,NULL,NULL,NULL,NULL,NULL,0.749815048945067,0.646367713004484,0.5
15949492992582,NULL,2.4335277819483,NULL,NULL,2.6,NULL,0.570616883116883,1.
>
11963210197913,NULL,1003,2008-03-23,0,Disc,NULL,2,15,10,6,3,NULL,3,3,3,3,3,2
,NULL,NULL,5,2,4,NULL,1,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,3,6,12
>
,4,10,NULL,NULL,3,3,5,1,2,2,1,NULL,NULL,NULL,NULL,NULL,1,NULL,NULL,NULL,NULL
,NULL,NULL,NULL,NULL,NULL,2,1,NULL,1,NULL,NULL,2,16,4,NULL,NULL,NULL,NULL,1
>
,1,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,1,5,NULL,NULL
,1,NULL,NULL,NULL,5,NULL,2,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NUL
>
L,NULL,NULL,NULL,NULL,NULL,NULL,NULL,11,3,10,NULL,6,NULL,NULL,1,NULL,3,9,NUL
L0d0a
1003,2008-03-23,0,Free,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NUL
L,NULL,NULL,NULL,NULL,0,0,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL
>
,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,
NULL,0,0,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,N
>
ULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NU
LL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NU
>
LL,NULL,NULL,NULL,0,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,N
ULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,0,NULL,0,NULL,0,NULL,NULL,NULL,
>
NULL,NULL,NULL,NULL,1003,2008-03-23,0,Free,NULL,NULL,NULL,NULL,NULL,NULL,NUL
L,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,1.1,1.28,NULL,NULL,NULL,NULL,NULL
>
,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,
NULL,NULL,NULL,NULL,NULL,NULL,1.08457627118644,1.28542372881356,NULL,NULL,N
>
ULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NU
LL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NU
>
LL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,0.9
9,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NUL
>
L,NULL,NULL,NULL,NULL,NULL,0.749580536912752,NULL,0.475,NULL,2.2225167785234
9,NULL,NULL,NULL,NULL,NULL,NULL,NULL,1003,2008-03-23,0,Free,NULL,NULL,NULL,
>
NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,1,1,NULL,NULL,NU
LL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NU
>
LL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,1,1,NULL,NULL,NULL,NULL,NULL,NULL
,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL
>
,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,
NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,2,NULL,NULL,NULL,NUL
>
L,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL
,NULL,6,NULL,2,NULL,1,NULL,NULL,NULL,NULL,NULL,NULL,NULL0d0a
(for reference: End of line characters odoa (CRLF) indicate Windows,
oa (LF) Unix and od (CR) Mac.
09 is the TAB character.)
. chunky using raw_price_data.csv, analyze;
Analyzing raw_price_data.csv for chunking
EXTENDED ASCII is the file type
File has 5320745 lines of average length 2214 bytes
Composition is 52% letters, 28% numbers and 20% other characters
Extended characters are present and may cause problems.
Extended characters found:
+-----------------+
|ASCII | count |
|------+----------|
|187 | 1|
|191 | 1|
|239 | 1|
+-----------------+
Approximate chunk sizes and memory requirements
for -insheet- or -infile- commands
+-----------------------------------------------------------+
|Chunksize (mb)| Number of | ~Number | Stata size* |
| option | Chunks | obs/chunk | (megabytes) |
|--------------+--------------+--------------+--------------|
| 10 | 1179 | 4513 | 10.2 |
| 30 | 393 | 13539 | 30.5 |
| 100 | 118 | 45091 | 101.5 |
| 300 | 40 | 133019 | 299.5 |
| 1000 | 12 | 443395 |998.3000000000001 |
| 3000 | 4 | 1330186 | 2994.8 |
+-----------------------------------------------------------+
* Stata file size is very approximate and depends on datatypes of variables
Further detail available by running hexdump `"raw_price_data.csv"',
analyze results
. hexdump raw_price_data.csv, analyze results;
Line-end characters Line length (tab=1)
\r\n (Windows) 5,320,745 minimum
1,777
\r by itself (Mac) 0 maximum
3,547
\n by itself (Unix) 0
Space/separator characters Number of lines
5,320,745
[blank] 0 EOL at EOF?
yes
[tab] 0
[comma] (,) 2,053,807,570 Length of first 5 lines
Control characters Line 1
2,494
binary 0 0 Line 2
1,945
CTL excl. \r, \n, \t 0 Line 3
2,039
DEL 0 Line 4
2,620
Extended (128-159,255) 0 Line 5
1,920
ASCII printable
A-Z 6,071,073,584
a-z 47,886,705 File format EXTENDED
ASCII
0-9 3,264,399,987
Special (!@#$ etc.) 334,050,065
Extended (160-254) 3
---------------
Total 11781859404
Observed were:
\n \r , - . 0 1 2 3 4 5 6 7 8 9 D E F L M N U c e i n r s u » ¿ ï
. chunky using raw_price_data.csv, chunksize(3000m) stub(rpd_) replace;
Chunking using the following settings:
Chunksize: 3,000,000,000
Memory: 6,442,450,944
Bites: 1
Bitesize: 3,000,000,000
fread(): 3300 argument out of range
chunkfile(): - function returned error [46]
<istmt>: - function returned error [1]
r(3300);
*
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*
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