hard drive - bash protect HD from excessive use -

-


hard drive - bash protect HD from excessive use -

how avoid breaking hd? have bash script running on ubuntu machine, meta code:

bash1.sh

while(true) run bash2.sh sleep 60 seconds done

bash2.sh:

if(directory empty): exit process file delete file

the directory network shared, , computer not doing else. 1 time per day new file arrives , processed. (i know bash1.sh can replaced watch). concern bash1.sh reading bash2.sh everytime - can presumably avoided having 1 script!? , bash2.sh reading same directory everytime. directory read hd, or ubuntu somehow caching dir in ram? -so read when changes? problem same place on hd read every time, or not matter because hd spinning? if hd never sleeps, matter if set loop time downwards 1 second?

maybe directory pure ram dir - how do that? -or there simple way check if has arrived on network without reading directory?

reading file or directory 1 time every 60 seconds not excessive use.

seriously, don't worry it.

if it's worrying you, can rethink strategy detecting file.

for example, need know, within 60 seconds, file has arrived? can arrive time during day? can parts of day considered unlikely?

using info that, can adjust timing of checks suit. if file supposed delivered after 4pm, don't check @ before then.

check every 60 seconds between 4pm , 5pm, every 10 minutes after that.

these business-related decisions can made still suggest it's unnecessary. provided regularly disks (and have standby hardware if need in hurry), shouldn't lose anything.

in fact, if really paranoid, dedicate entire machine this, sole purpose receive file via ftp and, when arrives, send across real processing box.

put nothing else on machine , have warm standby (exactly same software, ip address , on powered down) that, if fails, standby can activated in minutes.

the real processing machine written 1 time day - that's unlikely impact disk lifetime.

that's too paranoid liking shows there ways mitigate problem.

bash hard-drive

Comments

Post a Comment

Popular posts from this blog

How do I check if an insert was successful with MySQLdb in Python? -

-
How do I check if an insert was successful with MySQLdb in Python? - i have code: cursor = conn.cursor() cursor.execute(("insert new_files (videos_id, filename, " "is_processing) values (%s,%s,1)"), (id, filename)) logging.warn("%d", cursor.rowcount) if (cursor.rowcount == 1): logging.info("inserted values %d, %s", id, filename) else: logging.warn("failed insert values %d, %s", id, filename) cursor.close() fun is, cursor.rowcount always one, though updated database create videos_id unique key. is, insert fails because in tests same videos_id going appear (and when check database, nil inserted). whatever reason, rowcount 1 - logging.warn have spits out rowcount of 1. so, question: can utilize rowcount work out if insert went fine? if so, (presumably) doing wrong? otherwise, how check if insert went fine? your code not commit after modifications (your modifications rolled back). should...
Read more

delphi - blogger via idHTTP : error 400 bad request -

-
delphi - blogger via idHTTP : error 400 bad request - i'm trying post blogger using idhttp component, however, i'm getting "http/1.0 400 bad request" error. procedure tform1.button1click(sender: tobject); var request,response,req : tstringlist; auth,blogid : string; begin blogid := '00000000000000000000000'; request := tstringlist.create; response := tstringlist.create; req := tstringlist.create; idhttp1.request.connection := 'keep-alive'; idhttp1.request.contenttype := 'application/x-www-form-urlencoded'; idssliohandlersocket1.ssloptions.method := sslvsslv23; request.clear(); request.values['accounttype'] := 'google'; request.values['email'] := 'xxx@gmail.com'; request.values['passwd'] := 'yyy'; request.values['service'] := 'blogger'; response.text :=idhttp1.post('https://www.google.com/accounts/clientlogin',request); auth := resp...
Read more

postgresql - ERROR: operator is not unique: unknown + unknown -

-
postgresql - ERROR: operator is not unique: unknown + unknown - i have postgis database , have compute new values rows in new column. these values should average of values of several columns. query: insert bdps (da_m) values (avg('da_1'+'da_2'+'da_3'+'da_4'+'da_5'+'da_6'+'da_7')); in query bdps database, da_m new column , da_1 da_7 existing columns have double precision type. da_m created using alter table bdps add together column da_m double precision; i next error: error: operator not unique: unknown + unknown line 2: values (avg('da_1'+'da_2'+'da_3'+'da_4'+'da_5'+'da_6'+'da_7... ^ hint: not take best candidate operator. might need add together explicit type casts. ********** error ********** error: operator not unique: unknown + unknown sql state: 42725 hint: not take best candidate operator. might need add togethe...
Read more