java - Gem Fire 6 to Gem Fire 8 Upgrade -

-

we have gem fire 6 data, want migrate gem fire 8 data. possible options this? need our customers may not happy loose data in gem fire 6 servers. please advise.

see pivotal gemfire user guide here more details... http://gemfire.docs.pivotal.io/latest/userguide/index.html#getting_started/upgrade_from.html. in particular, pay close attention bullet #5.

also keep in mind... http://gemfire.docs.pivotal.io/latest/userguide/index.html#getting_started/version_compatiblity.html.

disclaimer: not experienced, or expert in upgrading gemfire, but...

i thinking there maybe more few ways accomplish feat depending on customer's ucs/requirements.

1 option big bang conversion , stream data between older gemfire cluster (e.g. 6.x) , newer gemfire cluster (e.g. 8.1) using spring xd.

another option "incrementally" migrate data old gemfire cluster new gemfire cluster on cache misses setting cacheloader in new gemfire cluster cache region(s) serve "cache clients" old gemfire cluster, corresponding cache region. when "cache miss" occurs in new region, attempt "load" value old region (hosted in older cluster). see section "version compatibility between clients , servers" in http://gemfire.docs.pivotal.io/latest/userguide/index.html#getting_started/version_compatiblity.html further details.

of course, both of these options, though doable, may not recommended , encourage verify pivotal ea/professional services team sure before choose approach.

i thinking outside box , giving ideas consider, ;-)

hope helps,

cheers!


Comments

Post a Comment

Popular posts from this blog

php - Zend Framework / Skeleton-Application / Composer install issue -

-
i trying create zend framework application using skeleton in netbeans. when run composer install, following error message: "c:\php\php.exe" "c:\composer\composer.phar" "--ansi" "--no-interaction" "update" "--dev" using deprecated option "dev". dev packages installed default now. loading composer repositories package information updating dependencies (including require-dev) requirements not resolved installable set of packages. problem 1 - package requires php >=5.5 php version (5.4.42) not satisfy requirement. problem 2 - installation request zendframework/zendframework 2.5.1 -> satisfiable zendframework/zendframework[2.5.1]. - zendframework/zendframework 2.5.1 requires php >=5.5 -> php version (5.4.42) not satisfy requirement. done. apparently, zend framework only needs php 5.3+ contradicts above. need use php 5.4. my composer.json following: { "name": "
Read more

c# - Better 64-bit byte array hash -

-
i need hash algorithm produces 64-bit hash code ( long ) fewer collisions string.gethashcode() , fast (no expensive calls cryptographic functions). here's implementation of fnv still shows 3% of collisions after testing 2 million random strings. need number way lower. void main() { const string chars = "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz!#@$%^&*()_+}{\":?><,./;'[]0123456789\\"; const int n = 2000000; var random = new random(); var hashes = new hashset<long>(); int collisions = 0; for(int = 0; < n; i++) { var len = random.next(chars.length); var str = new char[len]; (int j = 0; j < len; j++) { str[j] = chars[random.next(chars.length)]; } var s = new string(str); if(!hashes.add(get64bithash( s ))) collisions++; } console.writeline("collision percentage after " + n + " random strings: " + ((doubl
Read more

python - PyCharm Type error Message -

-
i'm newbie trying out ml/dbn in python (3.4) under pycharm (comm.ed 4.5). following definition def make_thetas(xmin,xmax,n): xs = np.linespace(xmin,xmax,n) widths = (xs[1:] - xs[:-1])/2.0 thetas = xs[:-1] + widths return thetas throws error "class 'tuple' not define ' sub ', '-' operator cannot used on instance" on - operator on third line (widths = ....) ideas on how code running under pycharm - works alright in interactive python window. thx. to all, after g'g lot have found workaround seems work within pycharm. workaround because (even python newbie) expected python not need explicit typecasting, not when using datatypes imported lib such numpy. def make_thetas(xmin,xmax,n): xs = np.array(np.linspace(xmin,xmax,n)) widths = (xs[1:] - xs[:-1])/2.0 thetas = xs[:-1]+ widths return thetas using docstrings type-hinting such below did not work def make_thetas(xmin,xmax,n): "&q
Read more