Displaying 20 results from an estimated 10000 matches similar to: "Writes ordering in Ext3"
2004 Feb 13
1
fsync in ext3: A question
Hi,
I have a question on fsync() and ext3's journaling modes.
Assume that I call fsync(fd) on a file.
If that file is in 'data=journal' mode, would the fsync() return once the
data gets safely into the journal ?
On the other hand, if that file is in 'data=writeback' mode, would the
fsync() return only when the data gets safely into its actual location ?
Any help is
2003 Oct 30
1
Transaction semantics in ext3
Hi,
I have a doubt on how the transaction semantics work in ext3.
When I copy a file, does the entire copy is treated as one
transaction so that finally I have either the full file or
no file. Or will it be split into multiple transactions which
can result in copying partial files.
thanks,
Vijayan
2004 Sep 16
1
kupdate daemon
Hi,
I'm using linux 2.4.25 and I'm trying to change the wakeup interval of
kupdate daemon. Is there a way to change that ?
I once used 'update' tool for that. But that is not there in 2.4.25.
Has it been removed ?
I appreciate any help regarding this.
thanks,
Vijayan
2004 Apr 21
2
Separate common journal device
Hi,
Is it possible to use a separate journal device (one on a separate
drive or a partition) shared among more than 1 Ext3 file systems ?
I appreciate any inputs.
thanks,
Vijayan
2004 Mar 04
1
Journal file location
Hi,
Is there any way that one can change the location of the journal
file when the file system is created ? For eg., instead of using inode# 7
and the blocks at the beginning of the file system, I'd like to use an
inode at a different cylinder group and some other set of blocks. Even if
I'm allowed only to use one of the reserved inodes, is it possible to put
the journal file somewhere in
2012 Feb 14
1
help with matrix column cleaning
Dear R Group
I have a matrix object in R, where i want to retain only those columns
which have each row from a different group..
see the example below..
team1<-c("a1","a2","b1","b2","b3","c1","c2")
teams<-combn(team1, 3)
I want a function which will delete all columns in the teams matrix that
have more than 1 row
2010 May 17
1
Query on linear mixed model
Hi R Forum
I am a newbie to R and I have been amazed by what
I can get my team to accomplish just by
implementing Scripting routines of R in all my
team's areas of interest..
Recently i have been trying to adopt R scripting
routine for some analysis with longitudanal data..
I am presenting my R script below that I have
tried to make to automate data analysis for
longitudanal data by employing
2009 Jun 04
0
Dropping terms from regression w/ poly()
Hello r-help,
I'm fitting a model with lm() and using the orthogonal polynomials
from poly() as my basis:
dat <- read.csv("ConsolidatedData.csv", header=TRUE)
attach(dat)
nrows <- 1925
Rad <- poly(Radius, 2)
ntheta <- 14
Theta <- poly(T.Angle..deg., ntheta)
nbeta <- 4
Beta <- poly(B.Beta..deg., nbeta)
model.1 <- lm( Measurement ~ Block + Rad + Theta + Beta
2011 Jun 18
3
how to subtract one string from another in R
Dear R Group
Here is what i am trying to do.. but couldnt figure out how..
string<-"ABC DEFG HIJKLM NOPQ RSTUV WXY"
string1<-substr(string,1,4)
I want to create an R object string 2 ( following the logic shown).. R does
not allow string subtraction.. any suggestions how to achieve this?
string2<-string-string1 (it should now hold "DEFG HIJKLM NOPQ RSTUV WXY"
I
2005 Dec 22
1
strsplit with dataframes
Hello fellow R people,
I can not figure out a pretty way to use strplit with vectors
Imagine that I got the following data from someone with ID's
representing several factors
ID data
A1-B1-t1 0
A1-B1-t2 1
A1-B2-t1 5
A1-B2-t2 10
A1-B10-t1 0
A1-B10-t2 1
A1-B20-t1 5
A1-B20-t2 10
...
I would like to turn this dataframe to
station substation time data
A1 B1 t1 0
A1 B1 t2 1
A1 B2 t1 5
2011 Apr 10
4
Password-protect R script files
There was a question in R forum very long time back.. on how to protect R
Script files from inadvertent editing by users.
There is a way to do this from within R, atleast in Windows XP I have tried
this and it certainly works , The method is very different from the OS
based folder protection route, however making available such a method in
the open forum would only kill the very spirit of R.
2011 Aug 04
2
random value generation with added constraint.
Hi
I am looking at generating a random dataset of say 100 values fitting in a
normal distribution of a given mean and SD, I am aware of rnorm
function. However i am trying to build into this function one added
constraint that all the random value generated should also obey the
constraint that they only take values between say X to X+25
How do i do this in R?
Any help would be highly appreciated,.
2012 Nov 15
3
GUI Development reg
Dear R Group
I have a character vector from which I want to select a few elements and
create a new character vector.
I need a GUI to do this in R Script.
Can someone help?
a<-c("A","B","C","D","E")
## I want to have a GUI in R that will display elements in "object a" as
a drop down list.. from there I want to be able to select a
2004 Dec 01
0
gnls(0 error: invalid variable type
Dear R-helpers;
While using gnls() to fit a function
> Gbht0t.gnls <- gnls(h2 ~ Rht(b0, b1, b2, h1,t1, t2), data=gbht10,
+ params=list(b0 + b1 + b2 ~ Sisp -1), start=c(strssb0,strssb1,strssb2))
I encountered an error:
"Error in model.frame(formula, rownames, variables, varnames, extras,
extranames, : invalid variable type "
Rht is a defined function to be
2002 Jan 25
0
nested versus crossed random effects
Hi all,
I'm trying to test a repeated measures model with random effects using the
nlme library. Suppose I have two within subjects factors A, B both with
two levels. Using aov I can do:
aov.1 <- aov(y ~ A*B + Error(S/(A+B))
following Pinheiro and Bates I can acheive the analagous mixed-effects
model with:
lme.1 <- lme(y~A*B, random=pdBlocked(list(pdIdent(~1),pdIdent(~A-1),
2017 Jul 14
0
Help with R script
@Don your solution does not solve Vijayan's scenario 2. I used spread and
gather for that.
An alternative solution to insert mising Fval - picking up with Don's
newtst - is
newtst <- c("FName: fname1", "Fval: Fval1.name1", "FName: fname2", "Fval:
Fval2.name2", "FName: fname3", "FName: fname4", "Fval: fval4.fname4")
2017 Jul 13
2
Help with R script
Using Ulrik?s example data (and assuming I understand what is wanted), here is what I would do:
ex.dat <- c("FName: fname1", "Fval: Fval1.name1", "Fval: ", "FName: fname2", "Fval: Fval2.name2", "FName: fname3")
tst <- data.frame(x = ex.dat, stringsAsFactors=FALSE)
sp <- strsplit(tst$x, ':', fixed=TRUE)
chk <-
2017 Jul 13
0
Help with R script
Hi Vijayan,
one way going about it *could* be this:
library(dplyr)
library(tidyr)
library(purrr)
ex_dat <- c("FName: fname1", "Fval: Fval1.name1", "Fval: ", "FName:
fname2", "Fval: Fval2.name2", "FName: fname3")
data.frame(x = ex_dat) %>%
separate(x, c("F1", "F2"), sep = ": ") %>%
filter(F2
2012 Feb 27
1
win zip archive of library(HH) for R2.12.0
Dear R Group
Can any body point me to a link from where I can get zip archive of the
package HH for R 2.12.0?
Thanks &
Regards
Vijayan Padmanabhan
"What is expressed without proof can be denied without proof" - Euclide.
Please visit us at www.itcportal.com
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This Communication is for the exclusive use
2003 Oct 09
2
ext3
Hi all . Can anyone tell me what are the other advantages of using ext3 over ext2 other than fast fast recovery on crashes
A reply will be appreciated.
Abhishek
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